Question

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

Answer 1

B

Explanation:

4x and 5x are adjacent angles on a straight line and sum to 180° , so

4x + 5x = 180

Answer 2

B

Explanation:

Angle is 180

combine like terms

180/9=20

X=20

4x+5x=180

4(20)+5(20)=180

hope this helps