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n in (-oo:+oo)
2*(n-4) = 3-(n/2) // - 3-(n/2)
2*(n-4)+n/2-3 = 0
(2^2*(n-4))/2+n/2+(-3*2)/2 = 0
2^2*(n-4)+n-3*2 = 0
5*n-16-6 = 0
5*n-22 = 0
(5*n-22)/2 = 0
(5*n-22)/2 = 0 // * 2
5*n-22 = 0
5*n-22 = 0 // + 22
5*n = 22 // : 5
n = 22/5
n = 22/5
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