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n in (-oo:+oo)
-n-8 = (-1/2)*n-(33/4) // - (-1/2)*n-(33/4)
33/4-n-((-1/2)*n)-8 = 0
(1/2)*n-n+33/4-8 = 0
1/4-1/2*n = 0 // - 1/4
-1/2*n = -1/4 // : -1/2
n = -1/4/(-1/2)
n = 1/2
n = 1/2
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