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2*x-(3/4) = 77/4 // - 77/4
2*x-(3/4)-(77/4) = 0
2*x-3/4-77/4 = 0
2*x-20 = 0 // + 20
2*x = 20 // : 2
x = 20/2
x = 10
x = 10
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