Question

QUal o valor de y nesse quadrilatero ?

Answer 1

x/3 + y = 180  ---mmc=3
x + 3y = 540 
3y = 540 - x
  y = (540-x)/3 ---(i)

x/2 = 90 --> x = 180 ---(ii)

Substitui (ii) no (i)
y = (540-180)/3 = 360/3 ==> y = 120