Question

qual o valor de x,y e z ?

Answer 1

Resposta:

3x=x+80°

3x-x=80°

2x=80°

x=80/2=40°

y=z

x+80+y=180°

40+80+y=180

120+y=180

y=180-120

y=60

se z=y, então z=60