Question

Sendo a paralela com b, valor de x é, em graus?

Answer 1

$120 + \frac{x}{3} + x = 180 \\ \frac{x}{3} + x = 60 \\ \frac{x +3x = 180 }{3} \\ 4x = 180 \\ x = \frac{180}{4 } = 45$
resposta d