Consider the diagram of supplementary angles

Question

128 on the left side of the angle 5x on the other side

10.4

52

61.6

92

Answer 1

The diagram shows that the two angles are supplementary, which means that their measures add up to 180 degrees.

So, we have:

128 + 5x = 180

Subtract 128 from both sides:

5x = 52

Divide by 5:

x = 10.4

Therefore, the measure of the angle on the other side is 5(10.4) = 52 degrees.