# Reproduce right-align behaviour of multline inside align environment using LyX

The multline environment is great for long equations. For example,

\begin{multline}
First line of my long equation \\
second line of my long equation
\end{multline}


produces output in which the second equation is right-aligned:

First line of my long equation
second line of my long equation


I would like to reproduce the same behaviour inside an align environment to align equalities but also right-align some lines. I.e. the output should look like

    A = first line of A
second line of A
other = first line of other
second line of other

• i don't have an answer, but a related question. if these equations are numbered, where would you like the number to be placed if it's at the right -- on the last line of each equation, or centered between the lines? – barbara beeton May 10 '16 at 14:56
• Ideally, centred for each set that belongs together but I am also happy to add the equation number to the last line. – Till Hoffmann May 10 '16 at 19:09

the multlined facility of mathtools can be used here:

\documentclass{article}
\usepackage{mathtools}
\begin{document}
\begin{align}
A &= \begin{multlined}[t]
\text{first line of A}\\
\text{second line of A}
\end{multlined}\\
\text{other} &= \begin{multlined}[t]
\text{first line of other}\\
\text{second line of other}
\end{multlined}
\end{align}
\end{document}


it's necessary to specify top-alignment with the optional [t] so that the lines of the multlined expression aren't vertically centered on the left-hand side. unfortunately, this has the effect of putting the equation number on the first line; i don't have a workaround for that.