# Labeling for two systems of two equations

I've tried eqnarray, align, equation with array, etc... but I can't figure out to make them like the picture...please help me out. Thanks in advance!

• Welcome to TeX.SX! Please show us what you've tried so far (MWE, minimal compilable code example). – TeXnician Jan 5 '18 at 14:31

try

\documentclass{article}
\usepackage{amsmath}

\begin{document}
\begin{align}
\begin{split}
a+b & =c+d+e   \\
c   & =f+g
\end{split}         \\
\begin{split}
a+b+c & = d+e+f   \\
g   & =h+i+j+k
\end{split}
\end{align}
\end{document}


• Oh I missed \\ in between the splits! Thank you so much! – 이광원 Jan 6 '18 at 12:09