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12+2(3n+1)=38
We move all terms to the left:
12+2(3n+1)-(38)=0
We add all the numbers together, and all the variables
2(3n+1)-26=0
We multiply parentheses
6n+2-26=0
We add all the numbers together, and all the variables
6n-24=0
We move all terms containing n to the left, all other terms to the right
6n=24
n=24/6
n=4
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