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(x+141)/11 = 15 // - 15
(x+141)/11-15 = 0
(x+141)/11+(-15*11)/11 = 0
x-15*11+141 = 0
x-24 = 0
(x-24)/11 = 0
(x-24)/11 = 0 // * 11
x-24 = 0
x-24 = 0 // + 24
x = 24
x = 24
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