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n in (-oo:+oo)
((5/9)/1)/12 = (n/3)/8 // - (n/3)/8
((5/9)/1)/12-((n/3)/8) = 0
(-1/24)*n+(5/9)/12 = 0
5/108-1/24*n = 0 // - 5/108
-1/24*n = -5/108 // : -1/24
n = -5/108/(-1/24)
n = 10/9
n = 10/9
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