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n in (-oo:+oo)
-1/16 = (-1/2)*n-((4/5)*n)+3/4 // - (-1/2)*n-((4/5)*n)+3/4
(4/5)*n-((-1/2)*n)-1/16-(3/4) = 0
(1/2)*n+(4/5)*n-1/16-3/4 = 0
13/10*n-13/16 = 0 // + 13/16
13/10*n = 13/16 // : 13/10
n = 13/16/13/10
n = 5/8
n = 5/8
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