Question

{x - 2y = 5;
{4x + y = 2.

Пж допоможіть

Answer 1

{x = 5 + 2y

{4*(5+2y) + y = 2

{x = 5 + 2y

{20 + 9y = 2

{x = 5 + 2y

{8y = -18

{y = -2

{x = 5 + (-2)*2

{x = 1

{y = -2