Question

1. Решите систему уравнений ​

Answer 1

$\begin{cases}y+4x=12\\2x-3y=-22\end{cases}\Rightarrow\begin{cases}y=12-4x\\2x-3\cdot(12-4x)=-22\end{cases}\\\\\\2x-3\cdot(12-4x)=-22\\2x-36+12x=-22\\14x=36-22\\14x=14\\x=1\\\\\begin{cases}y=8\\x=1\end{cases}$

Ответ: (1; 8)