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(5*x^1)/2 = 125 // - 125
(5*x^1)/2-125 = 0
(5*x)/2-125 = 0
5/2*x-125 = 0 // + 125
5/2*x = 125 // : 5/2
x = 125/5/2
x = 50
x = 50
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