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3(n+6)=-20
We move all terms to the left:
3(n+6)-(-20)=0
We add all the numbers together, and all the variables
3(n+6)+20=0
We multiply parentheses
3n+18+20=0
We add all the numbers together, and all the variables
3n+38=0
We move all terms containing n to the left, all other terms to the right
3n=-38
n=-38/3
n=-12+2/3
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