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(3/2)*(x-(9/2)) = 12 // - 12
(3/2)*(x-(9/2))-12 = 0
(3/2)*(x-9/2)-12 = 0
3/2*(x-9/2)-12 = 0
3/2*(x-9/2)-12 = 0
3/2*x-75/4 = 0
3/2*x-75/4 = 0
3/2*x-75/4 = 0 // + 75/4
3/2*x = 75/4 // : 3/2
x = 75/4/3/2
x = 25/2
x = 25/2
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