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N in (-oo:+oo)
N/0.3 = 66.66 // - 66.66
N/0.3-66.66 = 0
3.33333333*N-66.66 = 0 // + 66.66
3.33333333*N = 66.66 // : 3.33333333
N = 66.66/3.33333333
N = 19.99800002
N = 19.99800002
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