Question

Nas figuras, sabe-se, que y - x = 10. Determine o valor de z.
ajudem por favor!!

Answer 1

90+2x+3y=(6-2)180
2x+3y=4.180-90
2x+3y=720-90
2x+3y=630
y-x=10
y=10+x
2x+3(10+x)=630
2x+30+3x=630
5x=600
x=600/5
x=120°

y=10+120
y=130°

x+y+z=360°
120+130+z=360
250+z=360
z=360-250
z=110°