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N in (-oo:+oo)
N/2 = 3/8 // - 3/8
N/2-(3/8) = 0
N/2-3/8 = 0
1/2*N-3/8 = 0 // + 3/8
1/2*N = 3/8 // : 1/2
N = 3/8/1/2
N = 3/4
N = 3/4
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