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-2(3n-4)=-7n+8
We move all terms to the left:
-2(3n-4)-(-7n+8)=0
We multiply parentheses
-6n-(-7n+8)+8=0
We get rid of parentheses
-6n+7n-8+8=0
We add all the numbers together, and all the variables
n=0
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