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n in (-oo:+oo)
n/2 = (n+3)/4 // - (n+3)/4
n/2-((n+3)/4) = 0
(-1*(n+3))/4+n/2 = 0
(-1*2*(n+3))/(2*4)+(4*n)/(2*4) = 0
4*n-1*2*(n+3) = 0
2*n-6 = 0
(2*n-6)/(2*4) = 0
(2*n-6)/(2*4) = 0 // * 2*4
2*n-6 = 0
2*n-6 = 0 // + 6
2*n = 6 // : 2
n = 6/2
n = 3
n = 3
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