Question

What is the value of x?

A;108

B;72

C;18

D;36

Answer 1

D;36

Explanation:

Line AC is completely straight meaning it equals 180 degrees.

AB is 72 degrees.

So the equation would be 72 + 3x = 180

72 + 3x = 180

-72 -72

108 = 3x

180/3 = 36

3x/3 = x

x = 36