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3(3+8n)=9+3n
We move all terms to the left:
3(3+8n)-(9+3n)=0
We add all the numbers together, and all the variables
3(8n+3)-(3n+9)=0
We multiply parentheses
24n-(3n+9)+9=0
We get rid of parentheses
24n-3n-9+9=0
We add all the numbers together, and all the variables
21n=0
n=0/21
n=0
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