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8*x-(7*x)-(15/12) = 9/12+6/12 // - 9/12+6/12
8*x-(7*x)-(15/12)-(9/12)-(6/12) = 0
8*x-7*x-5/4-3/4-1/2 = 0
x-5/2 = 0 // + 5/2
x = 5/2
x = 5/2
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