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N in (-oo:+oo)
N/15 = 0.34 // - 0.34
N/15-0.34 = 0
1/15*N-0.34 = 0 // + 0.34
1/15*N = 0.34 // : 1/15
N = 0.34/1/15
N = 5.09999975
N = 5.09999975
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