Question

Two angles are supplementary. If one measures x and the other angle measures x+ 30, what is the value of x ?

Answer 1

the measure of x would be 30

Answer 2

Answer: x = 75

Remember: supplementary angles add up to 180°.

Form your equation.
x + x + 30 = 180

Solve for x.
x + x + 30 = 180 Combine like terms
2x + 30 = 180 Subtract 30 from both sides
2x = 150 Divide by 2 to both sides
x = 75 Answer!