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(1/5)*(x-25) = 4/5 // - 4/5
(1/5)*(x-25)-(4/5) = 0
(1/5)*(x-25)-4/5 = 0
1/5*(x-25)-4/5 = 0
(1/5*5*(x-25))/5-4/5 = 0
1/5*5*(x-25)-4 = 0
x-29 = 0
(x-29)/5 = 0
(x-29)/5 = 0 // * 5
x-29 = 0
x-29 = 0 // + 29
x = 29
x = 29
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