Question

Please look at the image

Answer 1

Equation to solve for "x": 90 + x + x + 18 = 180

x = 36

Explanation:

90 + x + x + 18 = 180

90 + 18 + 2x = 180

108 + 2x = 180

(108 - 108) + 2x = 180 - 108

2x = 72

2x/2 = 72/2

x = 36

90 + 36 + 36 + 18 = 180

108 + 72 = 180

180 = 180