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3*x-(4/5) = (2*x)/4 // - (2*x)/4
3*x-((2*x)/4)-(4/5) = 0
3*x+(-1/2)*x-4/5 = 0
5/2*x-4/5 = 0 // + 4/5
5/2*x = 4/5 // : 5/2
x = 4/5/5/2
x = 8/25
x = 8/25
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