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n-((n+x)/2)+x+1 = 0
(-1*(n+x))/2+n+x+1 = 0
(-1*(n+x))/2+(2*n)/2+(2*x)/2+(1*2)/2 = 0
2*n-1*(n+x)+2*x+1*2 = 0
n-x+2*x+2 = 0
n+x+2 = 0
(n+x+2)/2 = 0
(n+x+2)/2 = 0 // * 2
n+x+2 = 0
n+x+2 = 0 // - n+2
x = -(n+2)
x = -(n+2)
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