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