Answer:
x = 12
Step-by-step explanation:
This is an equilateral triangle. Thus, 4x - 10 = 5x - 22
4x - 10 = 5x - 22 yields 12 = x.
Check: do all 3 sides have the same length, as they must?
Does the length of AB equal the length of BC?
Does 4(12) - 10 = 3(12) + 2? YES
