If two angles are supplementary and one angle measures 113, what is the measures of the other angle?
a 113
b 87
c 67
d 37

Supplementary means they add up to 180

Lets say x is the angle we're looking for.

x + 113 = 180.

We want to isolate x. To do so, we subtract by 113 on both sides

x + 113 - 113 = 180 - 113

x = 67

C is the correct answer.