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(4/5)*(x-5)+(2/3)*x = 0
4/5*(x-5)+(2*x)/3 = 0
(4/5*3*(x-5))/3+(2*x)/3 = 0
4/5*3*(x-5)+2*x = 0
22/5*x-12 = 0
(22/5*x-12)/3 = 0
(22/5*x-12)/3 = 0 // * 3
22/5*x-12 = 0
22/5*x-12 = 0 // + 12
22/5*x = 12 // : 22/5
x = 12/22/5
x = 30/11
x = 30/11
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