Answer:
the measure of (5x - 4) = 56°
the measure of (9x + 16) = 124°
Step-by-step explanation:
these two angles are supplementary. that means the sum of these angles are equal 180°
5x - 4 + 9x + 16 = 180
5x + 9x = 180 + 4 - 16
14x = 168
x = 168/14
x = 12
the measure of angle 5x - 4 = 5*12 - 4 = 56°
the measure of angle 9x + 16 = 9*12 + 16 = 124°
56 + 124 = 180
