Question

{-3x+y=13
{2x+3y=-27

Answer 1

{- 3x + y =13
{2x + 3y= -27

{9x - 3y= -39
{2x + 3y = - 27

11x = - 66

x = - 6

-3 * (-6) + y = 13

y = - 5

Проверка :

{-3*(-6)-5=13
{2*(-6)+3*(-5)=-27

{13=13
{-27=-27

Ответ: ( - 6 ; -5)