3n+7,n=12

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



3n+7.n=12

We move all terms to the left:

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

We add all the numbers together, and all the variables

10n-12=0

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

10n=12

n=12/10

n=1+1/5

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