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N in (-oo:+oo)
N/6 = 2.8 // - 2.8
N/6-2.8 = 0
1/6*N-2.8 = 0 // + 2.8
1/6*N = 2.8 // : 1/6
N = 2.8/1/6
N = 16.79999966
N = 16.79999966
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