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n in (-oo:+oo)
-((1/2)*n)-6 = 8 // - 8
-((1/2)*n)-8-6 = 0
(-1/2)*n-8-6 = 0
-1/2*n-14 = 0 // + 14
-1/2*n = 14 // : -1/2
n = 14/(-1/2)
n = -28
n = -28
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