Question

помогите решить ))))))

Answer 1

{-5х+4у=-2 ||×3
{3х+7у=-27 ||×5

{-15х+12у=-6
{15х+35у=-135
15х-15х+12у+35у=-6-135
47у=-141
у=-3
3х+7×(-3)=-27
3х-21=-27
3х=-27+21
3х=-6
х=-2
(-2;-3)