Answer:
x=36
Explanation:
13) x = 30
14) x = 22.5
15) x = 36
13) 4x+2x = 180
6x = 180
x = 30
14) 3x+5x = 180
8x = 180
x = 22.5
15) 2x+3x+2x+3x = 360
10x = 360
x = 36
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