How do I flush the two equations to the right? And keep the eqution number centered between the two lines?
\documentclass{article}
\usepackage{amsmath}
\begin{document}
\begin{equation}
\begin{split}
a = b \\
b = c + d + e
\end{split}
\end{equation}
\end{document}
'flalign' can flush to the right, however with two lines, the number of the equation is not centered vertically.
'multiline' only flushes the last line to the right.
I also tried 'align' and 'aligned'. Didn't work out either.
I think I just don't get it....
It should look like this .......