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(3*x)/10-(x/5) = 1/5 // - 1/5
(3*x)/10-(x/5)-(1/5) = 0
(3*x)/10-(x/5)-1/5 = 0
1/10*x-1/5 = 0 // + 1/5
1/10*x = 1/5 // : 1/10
x = 1/5/1/10
x = 2
x = 2
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