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7*x+4/3 = 3*x-5 // - 3*x-5
7*x-(3*x)+4/3+5 = 0
7*x-3*x+4/3+5 = 0
4*x+19/3 = 0 // - 19/3
4*x = -19/3 // : 4
x = -19/3/4
x = -19/12
x = -19/12
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