Question

Решите систему x+8y=-6 5x-2y=12

Answer 1

X+8y=-6
5x-2y=12
x=-6-8y
5(-6-8y)-2y=12
-30-40y-2y=12
-42y=12+30
-42y=42
y=-1
x=-6-8*(-1)
x=-6+8
x=2
ответ: (2;-1)