Question

Solve for x in the diagram below.

Answer 1

X=20

Explanation:

The angle of a straight line is 180, so we add all of it together and set it equal to 180, then solve for x

x+3x+100=180

Combine like terms

4x+100=180

Subtract 100 from both sides

4x=80

Divide both sides by 4

x=20