Решите систему уравнений:

\(\displaystyle\begin{aligned}\begin{cases}5-5x=3(1-y){\small,}\\6(x+y)=x-2{,}5{\small.}\end{cases}\end{aligned}\)

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