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-2(-x+1)=4
We move all terms to the left:
-2(-x+1)-(4)=0
We add all the numbers together, and all the variables
-2(-1x+1)-4=0
We multiply parentheses
2x-2-4=0
We add all the numbers together, and all the variables
2x-6=0
We move all terms containing x to the left, all other terms to the right
2x=6
x=6/2
x=3
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