Question

resouva o seistema 2×+y=-3
×+y=-1

Answer 1

2x+y = -3
x+y = -1  *(-1)

2x+y = -3
-x-y = 1

x = -2

2x+y = -3
2(-2)+y = -3
-4+y = -3
y = -3+4
y = 1

x = -2 e y = 1.