Answer:
x = 24
Step-by-step explanation:
You're going to equal these angles to 180.
(x-17) degrees has a consecutive exterior angle. That angle happens to be vertical to the one you're trying to find which means they would have the same answer.
x - 17 + 7x + 5 = 180
8x - 12 = 180
8x = 192
x = 24
