7n+2n+3n=12

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Solution for 7n+2n+3n=12 equation: 



7n+2n+3n=12

We move all terms to the left:

7n+2n+3n-(12)=0

We add all the numbers together, and all the variables

12n-12=0

We move all terms containing n to the left, all other terms to the right

12n=12

n=12/12

n=1

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