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n in (-oo:+oo)
n/(-5.3) = -2.1 // + 2.1
n/(-5.3)+2.1 = 0
2.1-0.18867925*n = 0 // - 2.1
-0.18867925*n = -2.1 // : -0.18867925
n = -2.1/(-0.18867925)
n = 11.12999972
n = 11.12999972
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