Решите систему уравнений: \(\begin{aligned}\begin{cases}7(x+y)-9(x-y)=44{,}\\5(x+y)+4(x-y)=21{.}\end{cases}\end{aligned}\) \( x=\) \( ;\)\( y=\) \( .\)

Задание

Решите систему уравнений:

\(\displaystyle\begin{aligned}\begin{cases}7(x+y)-9(x-y)=44{\small,}\\5(x+y)+4(x-y)=21{\small.}\end{cases}\end{aligned}\)

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