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n in (-oo:+oo)
3/2 = n/50 // - n/50
3/2-(n/50) = 0
3/2-1/50*n = 0 // - 3/2
-1/50*n = -3/2 // : -1/50
n = -3/2/(-1/50)
n = 75
n = 75
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