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