Решите систему уравнений:

\(\displaystyle\begin{aligned}\begin{cases}2x-7(2y+3)=13{\small,}\\7(x+2)+3y=2y-7{\small.}\end{cases}\end{aligned}\)

\(\displaystyle x=\) [ ] \(\displaystyle ;\)\(\displaystyle y=\)  [ ]\(\displaystyle .\)