Question

Решите систему уравнений {4x= - 8
{2y-x=6

Answer 1

$left { {{4x=-8} atop {2y-x=6}} right. = textgreater left { {{x=-2} atop {2y+2=6}} right. = textgreater left { {{x=-2} atop {y=2}} right.$

Answer 2

4x=-8
2y-x=6- знак системи

-х =6-2y
x=2y+6
4(2y+6)=-8
8y+24=-8
8y=-8-24
8y=-32
y=-4
x=2*-4+6
x=-2
(-2. -4)