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-2n-4=-12-6n
We move all terms to the left:
-2n-4-(-12-6n)=0
We add all the numbers together, and all the variables
-2n-(-6n-12)-4=0
We get rid of parentheses
-2n+6n+12-4=0
We add all the numbers together, and all the variables
4n+8=0
We move all terms containing n to the left, all other terms to the right
4n=-8
n=-8/4
n=-2
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