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12n=34+5n
We move all terms to the left:
12n-(34+5n)=0
We add all the numbers together, and all the variables
12n-(5n+34)=0
We get rid of parentheses
12n-5n-34=0
We add all the numbers together, and all the variables
7n-34=0
We move all terms containing n to the left, all other terms to the right
7n=34
n=34/7
n=4+6/7
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