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3-((1/10)*x) = 1/5 // - 1/5
3-((1/10)*x)-(1/5) = 0
(-1/10)*x-1/5+3 = 0
14/5-1/10*x = 0 // - 14/5
-1/10*x = -14/5 // : -1/10
x = -14/5/(-1/10)
x = 28
x = 28
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