Two angles are supplementary. one angle is 3 degrees less than twice the other. find the measure of the angles.

Supplementary angles are angles that add to 180 degrees, so if we set the second angle to be x degrees, we can say that the first is 2x-3 degrees and therefore we have that:
(2x-3) + x = 180
3x - 3 = 180
3x = 183
x = 61 degrees

So one angles is 59 degrees and the other is 119 degrees

The answer is 1 because you have to flip the sign when dividing by negative number and 3