РЕШИТЕ СИСТЕМУ!!!!!!!!!!!!!!!! {4x+y=10 x+3y=-3 ДАМ 35 БАЛЛОВ !!!!!!!!!!!!!!!!!!!!!!

Question

РЕШИТЕ СИСТЕМУ!!!!!!!!!!!!!!!! {4x+y=10 x+3y=-3 ДАМ 35 БАЛЛОВ !!!!!!!!!!!!!!!!!!!!!!

Answer 1

{ 4x + y = 10

{x = -3 - 3y

_____

{4(-3 - 3y) + y = 10

{x = -3 - 3y

_____________

{-12 - 12y + y = 10

{x = -3y  -3

______

{11y = -22

{x = -3y - 3

________

{y = -2

{x = (-3)*(-2) - 3 = 6 - 3 = 3

Ответ: (3; -2)