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n in (-oo:+oo)
(3/4)*n-((1/8)*n)+2+16 = 0
(3/4)*n+(-1/8)*n+2+16 = 0
5/8*n+18 = 0 // - 18
5/8*n = -18 // : 5/8
n = -18/5/8
n = -144/5
n = -144/5
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