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7*x-(4/5) = 3*x-(67/15) // - 3*x-(67/15)
7*x-(3*x)-(4/5)+67/15 = 0
7*x-3*x-4/5+67/15 = 0
4*x+11/3 = 0 // - 11/3
4*x = -11/3 // : 4
x = -11/3/4
x = -11/12
x = -11/12
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