Question

resolva O Sistema x+8y=-14 2x-9y=-3.

Answer 1

x+8y=-14
2x-9y=-3

x+8y=-14(-2)
-2x-16y=28

Somando as duas
-2x-16y=28
2x-9y=-3, temos:

-25y=25
y=25/-25
y=-1

Usando x+8y=-14
x+8(-1)=-14
x-8=-14
x=-14+8
x=-6

R: x=-6;y=-1