Question

qual o valor de x+y?

A) 20 graus
B) 40 graus
C) 60 graus
D) 80 graus
E) 90 graus

Answer 1

(I) 4y - 10 = 30
4y = 30 + 10
4y = 40
y = 40/4
y = 10 graus


3 . (x + 10) = 60
3x + 30 = 60
3x = 60 - 30
3x = 30
x = 30/3
x = 10 graus

x + y = 10 + 10 = 20 graus

Resposta: 20 graus (Alternativa A).
Bons estudos!