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15(n-3)-12=396
We move all terms to the left:
15(n-3)-12-(396)=0
We add all the numbers together, and all the variables
15(n-3)-408=0
We multiply parentheses
15n-45-408=0
We add all the numbers together, and all the variables
15n-453=0
We move all terms containing n to the left, all other terms to the right
15n=453
n=453/15
n=30+1/5
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