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7*x-x+3/4 = 23/4 // - 23/4
7*x-x+3/4-(23/4) = 0
7*x-x+3/4-23/4 = 0
6*x-5 = 0 // + 5
6*x = 5 // : 6
x = 5/6
x = 5/6
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