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12+n=12n/3
We move all terms to the left:
12+n-(12n/3)=0
We add all the numbers together, and all the variables
n-(+12n/3)+12=0
We get rid of parentheses
n-12n/3+12=0
We multiply all the terms by the denominator
n*3-12n+12*3=0
We add all the numbers together, and all the variables
-12n+n*3+36=0
Wy multiply elements
-12n+3n+36=0
We add all the numbers together, and all the variables
-9n+36=0
We move all terms containing n to the left, all other terms to the right
-9n=-36
n=-36/-9
n=+4
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