Answer:
x=90
Step-by-step explanation:
3x-160 = x+20. Why you may ask? they are corresponding angles which makes them congruent. 2x = 180, so x = 90
90
angle 1 and 4 are equivalent so:
3x - 160 = x + 20
_________________
+160 I +160
3x = x + 180
- x I - x
2x = 108
÷2 I ÷2
x = 90
