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Aligning Systems of Equations

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4

I'm trying to line up the variables of systems of equations. The following code:

$$left\{

begin{aligned}

&alpha + 2&beta + &gamma & = 0 \\

3&alpha + 7&beta + 5&gamma & = 1

end{aligned}

right.$$

produces the following image:

I want the Greek letters and the math symbols to be aligned, with appropriate spacing in between coefficients. I've tried using begin{aligned} end{aligned} and begin{array}{ll} end{array}{ll} as well, but they also don't provide the desired outcome.

Would anyone be kind enough to help me out? Thank you.

math-mode align

share|improve this question

edited 3 hours ago

JouleV

4,1091938

asked 3 hours ago

SeankalaSeankala

1234

New contributor

Seankala is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  You can try the package systeme: ctan.org/pkg/systeme .
  
  – projetmbc
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  See also tex.stackexchange.com/questions/35174/…
  
  – Steven B. Segletes
  1 hour ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  See Why is [ … ] preferable to $$?
  
  – Werner
  1 hour ago
  

  
  
  
  

add a comment | 

4

I'm trying to line up the variables of systems of equations. The following code:

$$left\{

begin{aligned}

&alpha + 2&beta + &gamma & = 0 \\

3&alpha + 7&beta + 5&gamma & = 1

end{aligned}

right.$$

produces the following image:

I want the Greek letters and the math symbols to be aligned, with appropriate spacing in between coefficients. I've tried using begin{aligned} end{aligned} and begin{array}{ll} end{array}{ll} as well, but they also don't provide the desired outcome.

Would anyone be kind enough to help me out? Thank you.

math-mode align

share|improve this question

edited 3 hours ago

JouleV

4,1091938

asked 3 hours ago

SeankalaSeankala

1234

New contributor

Seankala is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  You can try the package systeme: ctan.org/pkg/systeme .
  
  – projetmbc
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  See also tex.stackexchange.com/questions/35174/…
  
  – Steven B. Segletes
  1 hour ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  See Why is [ … ] preferable to $$?
  
  – Werner
  1 hour ago
  

  
  
  
  

add a comment | 

I'm trying to line up the variables of systems of equations. The following code:

$$left\{

begin{aligned}

&alpha + 2&beta + &gamma & = 0 \\

3&alpha + 7&beta + 5&gamma & = 1

end{aligned}

right.$$

produces the following image:

I want the Greek letters and the math symbols to be aligned, with appropriate spacing in between coefficients. I've tried using begin{aligned} end{aligned} and begin{array}{ll} end{array}{ll} as well, but they also don't provide the desired outcome.

Would anyone be kind enough to help me out? Thank you.

math-mode align

share|improve this question

edited 3 hours ago

JouleV

4,1091938

asked 3 hours ago

SeankalaSeankala

1234

New contributor

Seankala is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$$left\{

begin{aligned}

&alpha + 2&beta + &gamma & = 0 \\

3&alpha + 7&beta + 5&gamma & = 1

end{aligned}

right.$$

share|improve this question

edited 3 hours ago

JouleV

4,1091938

asked 3 hours ago

SeankalaSeankala

1234

New contributor

Seankala is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this question

edited 3 hours ago

JouleV

4,1091938

asked 3 hours ago

SeankalaSeankala

1234

New contributor

Seankala is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

edited 3 hours ago

JouleV

4,1091938

edited 3 hours ago

JouleV

4,1091938

asked 3 hours ago

SeankalaSeankala

1234

New contributor

Seankala is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 3 hours ago

SeankalaSeankala

1234

3 Answers
3

active

oldest

votes

5

First of all, do not use $$ ... $$, which is plain TeX, use the LaTeX construct [ ... ].

Second, 4 alignment points require 7 ampersands, not 4: each new column of alignment has to be introduced by an ampersand. So n alignment points require 2n–1 ampersands.

Last: use alignat (or alignedat) to have full control on the spacing between columns of alignment.

Here is a possible code:

[ left{

begin{alignedat}{4}

&alpha &{} + 2&beta + {} & &gamma & & = 0 \\

3&alpha &{} + 7&beta + 5 & &gamma & & = 1

end{alignedat}

However, using the systeme package makes it simpler to type:

[ systeme[alphabetagamma]{alpha + 2beta +gamma = 0, 3alpha + 7beta + 5gamma = 1} ]

share|improve this answer

edited 1 hour ago

answered 2 hours ago

BernardBernard

170k775201

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I had no idea that $ was plain TeX, thanks! Unfortunately it seems that for the Github Markdown I'm trying to edit, [ doesn't seem to work... But begin{alignedat}{4} end{alignedat} works perfectly!
  
  – Seankala
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I've updated with a simpler way to type (the systeme command from the homonymous package).
  
  – Bernard
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  In your first method, the spacing around the = is not correct.
  
  – Steven B. Segletes
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  amsldoc (amsmath documentation) and systeme. Feel free to ask any questions.
  
  – Bernard
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  The empty curly braces are there because $+$ (or $-$) are binary operators with a special spacing w.r.t. the elements on the right and on the left. This can be destroyed by an ampersand, and to compensate, one has to add an empty argument, namely {}. For the number of &, maybe I was not clear enough: each column of alignment, but the first, has to be introduced by an &. Inside this column, the alignment point is specified with another &. Check on my code, you should see this rule is respected. Is this clear?
  
  – Bernard
  1 hour ago
  

  
  
  
  

 | 
show 4 more comments

6

Something like this?

documentclass{article}

usepackage{tabstackengine}

begin{document}

[

left{

setstackgap{L}{18pt}

Matrixstack[r]{

alpha  +& 2beta +&  gamma =& 0 \

3alpha +& 7beta +& 5gamma =& 1

}

right.

]

end{document}

share|improve this answer

answered 2 hours ago

Steven B. SegletesSteven B. Segletes

156k9201411

add a comment | 

3

Here's a solution that requires only the basic array package. The following code also sets up a custom array-like environment.

documentclass{article}

usepackage{array} % for "newcolumntype" macro

newcolumntype{C}{>{{}}c<{{}}}

%% set up a little custom enrironment:

newenvironment{myarray}[1]{%

   setlengtharraycolsep{0pt}

   left{ begin{array}{#1}}{%

   end{array} right.}



begin{document}

[

begin{myarray}{rCrCrCl}

 alpha &+& 2beta &+&  gamma &=& 0 \

3alpha &+& 7beta &+& 5gamma &=& 1

end{myarray}

]

end{document}

share|improve this answer

edited 2 hours ago

answered 2 hours ago

MicoMico

279k31381769

add a comment | 

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5

First of all, do not use $$ ... $$, which is plain TeX, use the LaTeX construct [ ... ].

Second, 4 alignment points require 7 ampersands, not 4: each new column of alignment has to be introduced by an ampersand. So n alignment points require 2n–1 ampersands.

Last: use alignat (or alignedat) to have full control on the spacing between columns of alignment.

Here is a possible code:

[ left{

begin{alignedat}{4}

&alpha &{} + 2&beta + {} & &gamma & & = 0 \\

3&alpha &{} + 7&beta + 5 & &gamma & & = 1

end{alignedat}

However, using the systeme package makes it simpler to type:

[ systeme[alphabetagamma]{alpha + 2beta +gamma = 0, 3alpha + 7beta + 5gamma = 1} ]

share|improve this answer

edited 1 hour ago

answered 2 hours ago

BernardBernard

170k775201

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I had no idea that $ was plain TeX, thanks! Unfortunately it seems that for the Github Markdown I'm trying to edit, [ doesn't seem to work... But begin{alignedat}{4} end{alignedat} works perfectly!
  
  – Seankala
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I've updated with a simpler way to type (the systeme command from the homonymous package).
  
  – Bernard
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  In your first method, the spacing around the = is not correct.
  
  – Steven B. Segletes
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  amsldoc (amsmath documentation) and systeme. Feel free to ask any questions.
  
  – Bernard
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  The empty curly braces are there because $+$ (or $-$) are binary operators with a special spacing w.r.t. the elements on the right and on the left. This can be destroyed by an ampersand, and to compensate, one has to add an empty argument, namely {}. For the number of &, maybe I was not clear enough: each column of alignment, but the first, has to be introduced by an &. Inside this column, the alignment point is specified with another &. Check on my code, you should see this rule is respected. Is this clear?
  
  – Bernard
  1 hour ago
  

  
  
  
  

 | 
show 4 more comments

5

First of all, do not use $$ ... $$, which is plain TeX, use the LaTeX construct [ ... ].

Second, 4 alignment points require 7 ampersands, not 4: each new column of alignment has to be introduced by an ampersand. So n alignment points require 2n–1 ampersands.

Last: use alignat (or alignedat) to have full control on the spacing between columns of alignment.

Here is a possible code:

[ left{

begin{alignedat}{4}

&alpha &{} + 2&beta + {} & &gamma & & = 0 \\

3&alpha &{} + 7&beta + 5 & &gamma & & = 1

end{alignedat}

However, using the systeme package makes it simpler to type:

[ systeme[alphabetagamma]{alpha + 2beta +gamma = 0, 3alpha + 7beta + 5gamma = 1} ]

share|improve this answer

edited 1 hour ago

answered 2 hours ago

BernardBernard

170k775201

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I had no idea that $ was plain TeX, thanks! Unfortunately it seems that for the Github Markdown I'm trying to edit, [ doesn't seem to work... But begin{alignedat}{4} end{alignedat} works perfectly!
  
  – Seankala
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I've updated with a simpler way to type (the systeme command from the homonymous package).
  
  – Bernard
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  In your first method, the spacing around the = is not correct.
  
  – Steven B. Segletes
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  amsldoc (amsmath documentation) and systeme. Feel free to ask any questions.
  
  – Bernard
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  The empty curly braces are there because $+$ (or $-$) are binary operators with a special spacing w.r.t. the elements on the right and on the left. This can be destroyed by an ampersand, and to compensate, one has to add an empty argument, namely {}. For the number of &, maybe I was not clear enough: each column of alignment, but the first, has to be introduced by an &. Inside this column, the alignment point is specified with another &. Check on my code, you should see this rule is respected. Is this clear?
  
  – Bernard
  1 hour ago
  

  
  
  
  

 | 
show 4 more comments

First of all, do not use $$ ... $$, which is plain TeX, use the LaTeX construct [ ... ].

Second, 4 alignment points require 7 ampersands, not 4: each new column of alignment has to be introduced by an ampersand. So n alignment points require 2n–1 ampersands.

Last: use alignat (or alignedat) to have full control on the spacing between columns of alignment.

Here is a possible code:

[ left{

begin{alignedat}{4}

&alpha &{} + 2&beta + {} & &gamma & & = 0 \\

3&alpha &{} + 7&beta + 5 & &gamma & & = 1

end{alignedat}

However, using the systeme package makes it simpler to type:

[ systeme[alphabetagamma]{alpha + 2beta +gamma = 0, 3alpha + 7beta + 5gamma = 1} ]

share|improve this answer

edited 1 hour ago

answered 2 hours ago

BernardBernard

170k775201

[ left{

begin{alignedat}{4}

&alpha &{} + 2&beta + {} & &gamma & & = 0 \\

3&alpha &{} + 7&beta + 5 & &gamma & & = 1

end{alignedat}

[ systeme[alphabetagamma]{alpha + 2beta +gamma = 0, 3alpha + 7beta + 5gamma = 1} ]

share|improve this answer

edited 1 hour ago

answered 2 hours ago

BernardBernard

170k775201

answered 2 hours ago

BernardBernard

170k775201

answered 2 hours ago

BernardBernard

170k775201

6

Something like this?

documentclass{article}

usepackage{tabstackengine}

begin{document}

[

left{

setstackgap{L}{18pt}

Matrixstack[r]{

alpha  +& 2beta +&  gamma =& 0 \

3alpha +& 7beta +& 5gamma =& 1

}

right.

]

end{document}

share|improve this answer

answered 2 hours ago

Steven B. SegletesSteven B. Segletes

156k9201411

add a comment | 

6

Something like this?

documentclass{article}

usepackage{tabstackengine}

begin{document}

[

left{

setstackgap{L}{18pt}

Matrixstack[r]{

alpha  +& 2beta +&  gamma =& 0 \

3alpha +& 7beta +& 5gamma =& 1

}

right.

]

end{document}

share|improve this answer

answered 2 hours ago

Steven B. SegletesSteven B. Segletes

156k9201411

add a comment | 

Something like this?

documentclass{article}

usepackage{tabstackengine}

begin{document}

[

left{

setstackgap{L}{18pt}

Matrixstack[r]{

alpha  +& 2beta +&  gamma =& 0 \

3alpha +& 7beta +& 5gamma =& 1

}

right.

]

end{document}

share|improve this answer

answered 2 hours ago

Steven B. SegletesSteven B. Segletes

156k9201411

documentclass{article}

usepackage{tabstackengine}

begin{document}

[

left{

setstackgap{L}{18pt}

Matrixstack[r]{

alpha  +& 2beta +&  gamma =& 0 \

3alpha +& 7beta +& 5gamma =& 1

}

right.

]

end{document}

share|improve this answer

answered 2 hours ago

Steven B. SegletesSteven B. Segletes

156k9201411

answered 2 hours ago

Steven B. SegletesSteven B. Segletes

156k9201411

answered 2 hours ago

Steven B. SegletesSteven B. Segletes

156k9201411

3

Here's a solution that requires only the basic array package. The following code also sets up a custom array-like environment.

documentclass{article}

usepackage{array} % for "newcolumntype" macro

newcolumntype{C}{>{{}}c<{{}}}

%% set up a little custom enrironment:

newenvironment{myarray}[1]{%

   setlengtharraycolsep{0pt}

   left{ begin{array}{#1}}{%

   end{array} right.}



begin{document}

[

begin{myarray}{rCrCrCl}

 alpha &+& 2beta &+&  gamma &=& 0 \

3alpha &+& 7beta &+& 5gamma &=& 1

end{myarray}

]

end{document}

share|improve this answer

edited 2 hours ago

answered 2 hours ago

MicoMico

279k31381769

add a comment | 

3

Here's a solution that requires only the basic array package. The following code also sets up a custom array-like environment.

documentclass{article}

usepackage{array} % for "newcolumntype" macro

newcolumntype{C}{>{{}}c<{{}}}

%% set up a little custom enrironment:

newenvironment{myarray}[1]{%

   setlengtharraycolsep{0pt}

   left{ begin{array}{#1}}{%

   end{array} right.}



begin{document}

[

begin{myarray}{rCrCrCl}

 alpha &+& 2beta &+&  gamma &=& 0 \

3alpha &+& 7beta &+& 5gamma &=& 1

end{myarray}

]

end{document}

share|improve this answer

edited 2 hours ago

answered 2 hours ago

MicoMico

279k31381769

add a comment | 

Here's a solution that requires only the basic array package. The following code also sets up a custom array-like environment.

documentclass{article}

usepackage{array} % for "newcolumntype" macro

newcolumntype{C}{>{{}}c<{{}}}

%% set up a little custom enrironment:

newenvironment{myarray}[1]{%

   setlengtharraycolsep{0pt}

   left{ begin{array}{#1}}{%

   end{array} right.}



begin{document}

[

begin{myarray}{rCrCrCl}

 alpha &+& 2beta &+&  gamma &=& 0 \

3alpha &+& 7beta &+& 5gamma &=& 1

end{myarray}

]

end{document}

share|improve this answer

edited 2 hours ago

answered 2 hours ago

MicoMico

279k31381769

documentclass{article}

usepackage{array} % for "newcolumntype" macro

newcolumntype{C}{>{{}}c<{{}}}

%% set up a little custom enrironment:

newenvironment{myarray}[1]{%

   setlengtharraycolsep{0pt}

   left{ begin{array}{#1}}{%

   end{array} right.}



begin{document}

[

begin{myarray}{rCrCrCl}

 alpha &+& 2beta &+&  gamma &=& 0 \

3alpha &+& 7beta &+& 5gamma &=& 1

end{myarray}

]

end{document}

share|improve this answer

edited 2 hours ago

answered 2 hours ago

MicoMico

279k31381769

answered 2 hours ago

MicoMico

279k31381769

answered 2 hours ago

MicoMico

279k31381769