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-(11-2x)+4x=31
We move all terms to the left:
-(11-2x)+4x-(31)=0
We add all the numbers together, and all the variables
-(-2x+11)+4x-31=0
We add all the numbers together, and all the variables
4x-(-2x+11)-31=0
We get rid of parentheses
4x+2x-11-31=0
We add all the numbers together, and all the variables
6x-42=0
We move all terms containing x to the left, all other terms to the right
6x=42
x=42/6
x=7
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