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n in (-oo:+oo)
n/0.7 = 0.03/2 // - 0.03/2
n/0.7-(0.03/2) = 0
n/0.7-0.015 = 0
1.42857143*n-0.015 = 0 // + 0.015
1.42857143*n = 0.015 // : 1.42857143
n = 0.015/1.42857143
n = 0.0105
n = 0.0105
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