Решите систему уравнений:

\(\displaystyle\begin{aligned}\begin{cases}4x-7(4y+5)=9{\small,}\\7(x+1)+4y=3y-1{\small.}\end{cases}\end{aligned}\)

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