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4x + 1 + 10 + 2x = x + 71
6x + 11 = x + 71
6x - x = 71 - 11
5x = 60
x = 60/5
x = 12
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21 + 3 (2x - 2) - 2x = 60 - x
21 + 6x - 6 - 2x = 60 - x
15 + 4x = 60 - x
4x + x = 60 - 15
5x = 45
x = 45/5
x = 9