Question

Which equation can be used to solve for X in the following diagram

Answer 1

C. 3x + 80 + 2x = 180

Explanation:

The straight line creates an angle of 180 °.

Therefore from the picture we have the equation:

3x + 80 + 2x = 180 subtract 80 from both sides

5x = 100 divide both sides by 5

x = 20