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n in (-oo:+oo)
600/12.2 = n/1220 // - n/1220
600/12.2-(n/1220) = 0
49.18032787-1/1220*n = 0 // - 49.18032787
-1/1220*n = -49.18032787 // : -1/1220
n = -49.18032787/(-1/1220)
n = 60000.15600181
n = 60000.15600181
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