Question

{4 x -5y = 1
{-2x + y = -11

Answer 1

Vamos là.

sistema

4x - 5y = 1

-2x + y = -11

-4x + 2y = -22

-3y = -21

y = 21/3 = 7

4x - 35 = 1

4x = 36

x = 9

S = {(9, 7)}