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(3/4)*(8*x-20) = 6*x-(12*x)+12 // - 6*x-(12*x)+12
(3/4)*(8*x-20)-(6*x)+12*x-12 = 0
(3/4)*(8*x-20)-6*x+12*x-12 = 0
3/4*(8*x-20)-6*x+12*x-12 = 0
3/4*(8*x-20)-6*x+12*x-12 = 0
12*x-15-12 = 0
12*x-27 = 0
12*x-27 = 0
12*x-27 = 0 // + 27
12*x = 27 // : 12
x = 27/12
x = 9/4
x = 9/4
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