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2n+1=2n+1-1
We simplify the equation to the form, which is simple to understand
2n+1=2n+1-1
We move all terms containing n to the left and all other terms to the right.
+2n-2n=+1-1-1
We simplify left and right side of the equation.
n=-1
0=-1
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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