Question

Qual e o resutado de 2x+y=-1 x+5y=-23

Answer 1

2x+y=-1

x+5y=-23

y=-1-2x

x+5(-1-2x)=-23

x+-5-10x=-23

-9x=-18

9x=18

x=2

4+y=-1

y=-5

S:{2,-5}