I'm sure this one is a hoary old chestnut that's been answered before, but i can't find that answer....I have set of equations (schematically) displayed thus, using amsmath:
\begin{align*}
a &= x1 &y &=1,\\
&= x2 & &=2,\\
&= x3 & &=3.
\end{align*}
What I want to do is put the second 'column' of equations (the "y=" results) inside a single set of brackets that spans all three rows. Just can't see how...?
\begin{cases} ... \end{cases}
. – TheIncredibleZ1 Nov 30 '17 at 16:46