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