Решите систему уравнений: \(\begin{aligned}\begin{cases}5(x+y)-7(x-y)=20{,}\\4(x+y)+3(x-y)=59{.}\end{cases}\end{aligned}\) \( x=\) \( ;\)\( y=\) \( .\)

Задание

Решите систему уравнений:

\(\displaystyle\begin{aligned}\begin{cases}5(x+y)-7(x-y)=20{\small,}\\4(x+y)+3(x-y)=59{\small.}\end{cases}\end{aligned}\)

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