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4*x-3/4 = -115/4 // + -115/4
4*x-3/4-(-115/4) = 0
4*x-3/4+115/4 = 0
4*x+28 = 0 // - 28
4*x = -28 // : 4
x = -28/4
x = -7
x = -7
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