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