Answer:
A. 20
Step-by-step explanation:
As a rule of Geometry, anything that is vertically opposite are considered equal angles to each other. Set the two equations equal and find x.
7x-99=2x+1
Add 99 to both sides to get 7x=2x+100. Subtract 2x to get 5x=100. Divide both sides by 5 to get x=20.
