Решите систему уравнений: \(\begin{aligned}\begin{cases}\dfrac{4x}{5}=3+\dfrac{y}{7}{,}\\ \\\dfrac{4x}{5}+y=-21{.}\end{cases}\end{aligned}\) \( x=\) \( ;\)\( y=\) \( .\)

Задание

Решите систему уравнений:

\(\displaystyle\begin{aligned}\begin{cases}\dfrac{4x}{5}=3+\dfrac{y}{7}{\small,}\\ \\\dfrac{4x}{5}+y=-21{\small.}\end{cases}\end{aligned}\)

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