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