Answer:
22
Explanation:
- opposite angles, therefore congruent, we solve with an equation for x
3x - 14 = [ 4(x-9)]
3x - 14 = 4x - 36
-14 + 36 = 4x - 3x
22 = x
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check
3 x 22 - 14 = [4(22 - 9)
52 = 52
same value the answer is good