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