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n in (-oo:+oo)
3*n-(7/(-2)) = 5-0.25 // - 5-0.25
3*n-(7/(-2))-5+0.25 = 0
3*n+7/2-5+0.25 = 0
3*n-1.25 = 0 // + 1.25
3*n = 1.25 // : 3
n = 1.25/3
n = 0.41666667
n = 0.41666667
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