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n in (-oo:+oo)
n/8 = (n+1)/12 // - (n+1)/12
n/8-((n+1)/12) = 0
(-1*(n+1))/12+n/8 = 0
(-1*8*(n+1))/(8*12)+(12*n)/(8*12) = 0
12*n-1*8*(n+1) = 0
4*n-8 = 0
(4*n-8)/(8*12) = 0
(4*n-8)/(8*12) = 0 // * 8*12
4*n-8 = 0
4*n-8 = 0 // + 8
4*n = 8 // : 4
n = 8/4
n = 2
n = 2
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