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5-((1/2)*x) = (1/8)*x // - (1/8)*x
5-((1/2)*x)-((1/8)*x) = 0
(-1/2)*x+(-1/8)*x+5 = 0
5-5/8*x = 0 // - 5
-5/8*x = -5 // : -5/8
x = -5/(-5/8)
x = 8
x = 8
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