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n in (-oo:+oo)
1/2-((1*n)/8) = 3/8 // - 3/8
1/2-((1*n)/8)-(3/8) = 0
1/2-(n/8)-3/8 = 0
1/8-1/8*n = 0 // - 1/8
-1/8*n = -1/8 // : -1/8
n = -1/8/(-1/8)
n = 1
n = 1
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