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(3*x)/4-((21*x)/32) = 9/8 // - 9/8
(3*x)/4-((21*x)/32)-(9/8) = 0
(3*x)/4+(-21/32)*x-9/8 = 0
3/32*x-9/8 = 0 // + 9/8
3/32*x = 9/8 // : 3/32
x = 9/8/3/32
x = 12
x = 12
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