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6*x-(3/2) = 18 // - 18
6*x-(3/2)-18 = 0
6*x-3/2-18 = 0
6*x-39/2 = 0 // + 39/2
6*x = 39/2 // : 6
x = 39/2/6
x = 13/4
x = 13/4
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