How to write the equation number manually?

Question

Does anyone know how to number an equation manually? I know using \begin{equation} automatically numbers the equation but I want to number it manually.

Like this:

ax=b                      2.1

ax=b                      2.2

etc.

Any specific reason, why you want to number them manually? – samcarter_is_at_topanswers.xyz Feb 25 '16 at 17:20 — samcarter_is_at_topanswers.xyz, Feb 25 '16 at 17:20

score 12 · Accepted Answer · answered Feb 24 '16 at 17:32

12

You can use the amsmath package and the \tag command. If you don't want the parenthesis, use \tag*.

\documentclass{article}
\usepackage{amsmath}
\begin{document}
    \begin{equation}
        ax= b \tag{2.1}
    \end{equation}
\end{document}

answered Feb 24 '16 at 17:32

Ondrian

1,536

4

And still be able to use \label and \eqref! – egreg Feb 24 '16 at 18:13

How to write the equation number manually?

1 Answers1