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5*((1/5)*x-24) = 5*((-4/5)*x+91) // - 5*((-4/5)*x+91)
5*((1/5)*x-24)-(5*((-4/5)*x+91)) = 0
5*((1/5)*x-24)-5*((-4/5)*x+91) = 0
5*(1/5*x-24)-5*(91-4/5*x) = 0
5*(1/5*x-24)-5*(91-4/5*x) = 0
5*x-575 = 0
5*x-575 = 0
5*x-575 = 0 // + 575
5*x = 575 // : 5
x = 575/5
x = 115
x = 115
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