Answer:
15
Step-by-step explanation:
Exterior angles are always the sum of two angles in the triangle, so let's make an equation!!
3x + 8x - 8 = 157
Add like terms-- 3x + 8x = 11x
Now, the equation is 11x -8 = 157
Now solve for x.
Add 8 on both sides,,
11x = 165
Now divide 11 on both sides to cancel it out and isolate x.
x=15
Hope this helps!!
-Ketifa
