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Answer:
1) x = 36
2) x = 127
3) x = 36
Step-by-step explanation:
1)
x + 144 = 180
x = 36
2)
15 + x + 38 = 180
x + 53 = 180
x = 127
3)
2x + 16 + 92 = 180
2x + 108 = 180
2x = 72
x = 36