Question

gente me ajudem a fazer esse sistema:
3x+y=-16
2x-3y=-7
obg

Answer 1

{3x+y=-16
{2x-3y=-7
3x+y=-16.(3)
{9x+3y=-48
{2x-3y=-7
11x=-55
x=-55/11
x=-5
2x-3y=-7
2.(-5)-3y=-7
-10-3y=-7
-3y=-7+10
-3y=3.(-1)
3y=-3
y=-3/3
y=-1
S={-5, -1}