Answer:
A.) 30
Step-by-step explanation:
The entire figure consists of two angles supplementary to each other, which means that ∠YWZ + ∠ZWX = 180°. Since ∠ZWX is 20°, we know that ∠YWZ is 160°.
So now we have an equation to solve:
5x + 10 = 160
- 10 - 10
5x = 150
÷ 5 ÷ 5
x = 30
