In the align environment, how to number only one of the lines?

Question

Possible Duplicate:
Selective numbering of equations with align

I would like to know, how to number only one specific line among many, in the align environment.

For instance, I don't want to number all the step of my equation, only the final result.

possible duplicate of Selective numbering of equations with align See also Make align* number the last equation, which is at least a little related. — Torbjørn T., Aug 18 '12 at 23:59

percusse · Accepted Answer · 2017-06-10T10:04:45.600

7

You can use the \notag command

\documentclass{article}
\usepackage{amsmath}
\begin{document}
\begin{align}
x=5\notag\\
y=2\notag\\
z=1
\end{align}
\end{document}

enter image description here

edited Jun 10 '17 at 10:04

answered Aug 18 '12 at 23:43

percusse

157,807

I think we jumped here together. I changed my answer to \nonumber. – Aug 18 '12 at 23:45
@HarishKumar No problem. Today, I had this more than twice :) – percusse Aug 18 '12 at 23:47

score 6 · Answer 2 · edited Jul 15 '17 at 15:36

6

You can use \notag or \nonumber to get rid of numbers.

\documentclass{article}
\usepackage{amsmath}
\begin{document}
\begin{align}
ax^2+bx+c
        & = 0\nonumber\\
ax^2+bx
        & = -c\nonumber\\
ax^2+bx
        & = -c
\end{align}
\end{document}

edited Jul 15 '17 at 15:36

David Carlisle

757,742

answered Aug 18 '12 at 23:44

\nonumber seems to be preferable. See https://tex.stackexchange.com/questions/48965/what-is-the-difference-between-notag-and-nonumber-in-align-environment – Johannes Jul 29 '19 at 14:57

In the align environment, how to number only one of the lines?

2 Answers2

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