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(3/2)*(10*x-12) = 1*x+5*x+12 // - 1*x+5*x+12
(3/2)*(10*x-12)-(1*x)-(5*x)-12 = 0
(3/2)*(10*x-12)-x-5*x-12 = 0
3/2*(10*x-12)-x-5*x-12 = 0
3/2*(10*x-12)-x-5*x-12 = 0
14*x-5*x-18-12 = 0
9*x-18-12 = 0
9*x-30 = 0
9*x-30 = 0
9*x-30 = 0 // + 30
9*x = 30 // : 9
x = 30/9
x = 10/3
x = 10/3
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