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n in (-oo:+oo)
n/0.2 = 0.03/4 // - 0.03/4
n/0.2-(0.03/4) = 0
n/0.2-0.0075 = 0
5*n-0.0075 = 0 // + 0.0075
5*n = 0.0075 // : 5
n = 0.0075/5
n = 0.0015
n = 0.0015
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