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-(-x+1)=x+1
We move all terms to the left:
-(-x+1)-(x+1)=0
We add all the numbers together, and all the variables
-(-1x+1)-(x+1)=0
We get rid of parentheses
1x-x-1-1=0
We add all the numbers together, and all the variables
-2!=0
There is no solution for this equation
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