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2*x-5/8 = (4/5)*x-(9/40) // - (4/5)*x-(9/40)
2*x-((4/5)*x)-5/8+9/40 = 0
2*x+(-4/5)*x-5/8+9/40 = 0
6/5*x-2/5 = 0 // + 2/5
6/5*x = 2/5 // : 6/5
x = 2/5/6/5
x = 1/3
x = 1/3
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