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n in (-oo:+oo)
3*n-(7/(-2)) = 5-(0.25*n) // - 5-(0.25*n)
3*n+0.25*n-(7/(-2))-5 = 0
3*n+0.25*n+7/2-5 = 0
3.25*n-3/2 = 0 // + 3/2
3.25*n = 3/2 // : 3.25
n = 3/2/3.25
n = 0.46153846
n = 0.46153846
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