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n in (-oo:+oo)
n/0.2 = 0.04/5 // - 0.04/5
n/0.2-(0.04/5) = 0
n/0.2-0.008 = 0
5*n-0.008 = 0 // + 0.008
5*n = 0.008 // : 5
n = 0.008/5
n = 0.0016
n = 0.0016
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