31=7n+3

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Solution for 31=7n+3 equation: 



31=7n+3

We move all terms to the left:

31-(7n+3)=0

We get rid of parentheses

-7n-3+31=0

We add all the numbers together, and all the variables

-7n+28=0

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

-7n=-28

n=-28/-7

n=+4

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