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-12x-31=11-6x
We move all terms to the left:
-12x-31-(11-6x)=0
We add all the numbers together, and all the variables
-12x-(-6x+11)-31=0
We get rid of parentheses
-12x+6x-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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