Question

The angles below are supplementary. What is the value of x? (5 points)

Answer 1

4x + 20 + 40 = 180
4x + 60 = 180
4x = 120
x = 30

Answer 2

x = 30

Explanation:

Angles on a line equal 180

4x + 20 + 40 = 180

4x + 60 = 180

Minus 60 on both sides.

4x = 120

Divide by 4 on both sides.

x = 30