31=7+8n

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Solution for 31=7+8n equation: 



31=7+8n

We move all terms to the left:

31-(7+8n)=0

We add all the numbers together, and all the variables

-(8n+7)+31=0

We get rid of parentheses

-8n-7+31=0

We add all the numbers together, and all the variables

-8n+24=0

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

-8n=-24

n=-24/-8

n=+3

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