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(3/4)*(3*x-9) = 6 // - 6
(3/4)*(3*x-9)-6 = 0
3/4*(3*x-9)-6 = 0
3/4*(3*x-9)-6 = 0
9/4*x-51/4 = 0
9/4*x-51/4 = 0
9/4*x-51/4 = 0 // + 51/4
9/4*x = 51/4 // : 9/4
x = 51/4/9/4
x = 17/3
x = 17/3
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