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(3/2)*(x-5) = 12 // - 12
(3/2)*(x-5)-12 = 0
3/2*(x-5)-12 = 0
3/2*(x-5)-12 = 0
3/2*x-39/2 = 0
3/2*x-39/2 = 0
3/2*x-39/2 = 0 // + 39/2
3/2*x = 39/2 // : 3/2
x = 39/2/3/2
x = 13
x = 13
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