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x-((2*x)/100) = 225 // - 225
x-((2*x)/100)-225 = 0
x+(-1/50)*x-225 = 0
49/50*x-225 = 0 // + 225
49/50*x = 225 // : 49/50
x = 225/49/50
x = 11250/49
x = 11250/49
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