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