Question

Observe a figura e determine o valor x+y

Answer 1

Montando as relações:

$\begin{cases}2y+15+40+x+y=180\\40+x=90\to\boxed{x=50}\end{cases}$

$2y+15+\overbrace{40+x}^{90}+y=180\\\\2y+15+90+y=180\\\\3y=180-90-15\\\\3y=75\\\\\boxed{y=25}$

$\boxed{\mathsf{S=\{50,25\}}}$