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5*x-(3/7) = (2*x)/3 // - (2*x)/3
5*x-((2*x)/3)-(3/7) = 0
5*x+(-2/3)*x-3/7 = 0
13/3*x-3/7 = 0 // + 3/7
13/3*x = 3/7 // : 13/3
x = 3/7/13/3
x = 9/91
x = 9/91
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