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2*x-(4/5) = 10 // - 10
2*x-(4/5)-10 = 0
2*x-4/5-10 = 0
2*x-54/5 = 0 // + 54/5
2*x = 54/5 // : 2
x = 54/5/2
x = 27/5
x = 27/5
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