Answer:
x=30 ; y=60 ; z=120.
Step-by-step explanation:
(we can solve it in a system.)
z+2x=180 => z=180-2x y+4x=180 => y=180-4x
y+z=180
4x+2x=180 => 6x=180 => x=30 <=>
z=180-2*x=180-2*30=180-60=120
y=180-4x =180-4*30=180-120=60
