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-(1-x)=2x
We move all terms to the left:
-(1-x)-(2x)=0
We add all the numbers together, and all the variables
-(-1x+1)-2x=0
We add all the numbers together, and all the variables
-2x-(-1x+1)=0
We get rid of parentheses
-2x+1x-1=0
We add all the numbers together, and all the variables
-1x-1=0
We move all terms containing x to the left, all other terms to the right
-x=1
x=1/-1
x=-1
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