Question

. Решите систему уравнений:

Answer 1

$\left \{ {{x+8y=-6} \atop {5x-2y=12}} \right.$
$\left \{ {{x=-6-8y} \atop {5x-2y=12}} \right.$
5(-6-8y)-2y=12
-30-40y-2y=12
-42y=12+30
y=$\frac{42}{-42}$
y=-1
x=-6-8y=-6-8·(-1)=-6+8=2
Ответ: $\left \{ {{x=2} \atop {y=-1}} \right.$