Question

What is the value for x? A.20 B,14 C.12 D.16

Answer 1

A. 20

Explanation:

For vertical angles

7x - 99 = 2x + 1

7x - 2x = 1 + 99

5x = 100

x = 20

Answer 2

A. 20

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.