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In the align environment you can put two (or more) equations on one line:

\begin{align}
x+y &= 1  &  x+z &= 1 \\
x+w &= 1  &  w+z &= 1
\end{align}

By default this results in two lines with equation numbers. But there are 4 equations in the above example, and I would like to have them individually labeled and numbered. Putting two labels on one line results in an error.

How do you get equation numbers and labels for each separate equation in the align environment?

Alternative environments are OK, but because of the publisher this is expected to go to, I may not be able to add out of the ordinary packages.

I have tried side-by-side minipages with an align in each one, but then the equations are not aligned between columns and it looks terrible.

Jeff Snider
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    I believe this has already been asked. The problem is the ambiguity in the numbering: readers will have difficulties in attributing the number in the center of the page to either equation on the same row. And equation numbers should all be in a fixed position for ease of browsing. – egreg Feb 15 '14 at 18:12
  • If it has been asked, I haven't found the question. Please provide a reference! – Jeff Snider Feb 15 '14 at 18:20
  • Related: How to align a set of multiline equations –  Feb 15 '14 at 18:27
  • How should the numbering proceed: from left to right within a given row and from there on to the next row, or first all equations in the first column, followed by the equations in the second column? – Mico Feb 15 '14 at 18:37
  • It might be nice to control how numbering proceeds, but at least for the moment it does not matter. – Jeff Snider Feb 15 '14 at 18:42
  • The question http://tex.stackexchange.com/questions/44450/how-to-align-a-set-of-multiline-equations is similar but not the same, and does not have an adequate answer: my equations vary in height and that technique results in misalignment on horizontal lines. – Jeff Snider Feb 15 '14 at 18:46
  • @JeffSnider - I suggest you post a new query, one that builds on the answer(s) provided in Numbering side-by-side equations or inline equations, and asks for specific assistance fixing the horizontal alignment of equations within a row if the equations vary in height and depth. – Mico Feb 15 '14 at 21:04

0 Answers0