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7*x+1/4 = 57/4 // - 57/4
7*x+1/4-(57/4) = 0
7*x+1/4-57/4 = 0
7*x-14 = 0 // + 14
7*x = 14 // : 7
x = 14/7
x = 2
x = 2
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