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n in (-oo:+oo)
(3/8)*n-((11/2)*n) = -4 // + 4
(3/8)*n-((11/2)*n)+4 = 0
(3/8)*n+(-11/2)*n+4 = 0
4-41/8*n = 0 // - 4
-41/8*n = -4 // : -41/8
n = -4/(-41/8)
n = 32/41
n = 32/41
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