Answer:
x = 32
Step-by-step explanation:
The angle above 72° is 108° because they are supplementary angles, meaning they add up to 180°. Then we can set the equation 108° = (3x + 12)° because they are alternate interior angles, meaning that they are the same. So then we just solve for x.
108 = (3x + 12)
108 - 12 = 3x
96 = 3x
96 / 3 = x
32 = x
