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(2*(x-3)^1)/2 = 12 // - 12
(2*(x-3)^1)/2-12 = 0
(2*(x-3))/2-12 = 0
x-12-3 = 0
x-12-3 = 0
x-15 = 0
x-15 = 0
x-15 = 0 // + 15
x = 15
x = 15
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