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Based on the information given, we can set up an equation:
(3x-7) + (x+15) = 180
Simplifying this equation, we get:
4x + 8 = 180
Subtracting 8 from both sides, we get:
4x = 172
Dividing both sides by 4, we get:
x = 43
Therefore, the value of x is 43.