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62.5 = (25*x)/2 // - (25*x)/2
62.5-((25*x)/2) = 0
(-25/2)*x+62.5 = 0
62.5-25/2*x = 0 // - 62.5
-25/2*x = -62.5 // : -25/2
x = -62.5/(-25/2)
x = 5
x = 5
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