3+7n+2n=31

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Solution for 3+7n+2n=31 equation: 



3+7n+2n=31

We move all terms to the left:

3+7n+2n-(31)=0

We add all the numbers together, and all the variables

9n-28=0

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

9n=28

n=28/9

n=3+1/9

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