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n in (-oo:+oo)
(3*n)/(-1) = 1/8 // - 1/8
(3*n)/(-1)-(1/8) = 0
-3*n-1/8 = 0
-3*n-1/8 = 0 // + 1/8
-3*n = 1/8 // : -3
n = 1/8/(-3)
n = -1/24
n = -1/24
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