Question

Determine o valor de x e y

Answer 1

x + 30 = y - 10
x = y - 40

2y + y -10 + x + 30 = 180
2y + y -10 + y - 40 + 30 = 180
4y = 180 + 20
4y = 200
y = 50

x + 30 = y - 10
x + 30 = 50 - 10
x = 10