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3n+3+n=-(n-1)+2(n+1)
We simplify the equation to the form, which is simple to understand
3n+3+n=-(n-1)+2(n+1)
Remove unnecessary parentheses
3n+3+n=-1n+1+2*(n+1)
Reorder the terms in parentheses
3n+3+n=-1n+1+(+2n+2)
Remove unnecessary parentheses
+3n+3+n=-1n+1+2n+2
We move all terms containing n to the left and all other terms to the right.
+3n+1n+1n-2n=+1+2-3
We simplify left and right side of the equation.
+3n=0
We divide both sides of the equation by 3 to get n.
n=0
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