Question

x + y = -3 2x + 3y = -13 qual a resposta ?

Answer 1

x + y  = -3
2x + 3y = -13

x + y = -3
y = -3 - x

2x + 3y = -13
2x + 3 (-3 - x) = -13
2x - 9 - 3x = -13
2x - 3x = -13 + 9
-x = - 4
x = - 4/-1
x = 4

y = - 3 - x
y = - 3 - 4
y = -7