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(x+112)/5 = x // - x
(x+112)/5-x = 0
(x+112)/5+(5*(-x))/5 = 0
x+5*(-x)+112 = 0
112-4*x = 0
(112-4*x)/5 = 0
(112-4*x)/5 = 0 // * 5
112-4*x = 0
112-4*x = 0 // - 112
-4*x = -112 // : -4
x = -112/(-4)
x = 28
x = 28
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