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3-((1/5)*x) = 72/25 // - 72/25
3-((1/5)*x)-(72/25) = 0
(-1/5)*x-72/25+3 = 0
3/25-1/5*x = 0 // - 3/25
-1/5*x = -3/25 // : -1/5
x = -3/25/(-1/5)
x = 3/5
x = 3/5
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