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n in (-oo:+oo)
(1/6)*n-((3/5)*n)+4 = 112/15 // - 112/15
(1/6)*n-((3/5)*n)-(112/15)+4 = 0
(-3/5)*n+(1/6)*n-112/15+4 = 0
-13/30*n-52/15 = 0 // + 52/15
-13/30*n = 52/15 // : -13/30
n = 52/15/(-13/30)
n = -8
n = -8
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