31=7n-4

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Solution for 31=7n-4 equation: 



31=7n-4

We move all terms to the left:

31-(7n-4)=0

We get rid of parentheses

-7n+4+31=0

We add all the numbers together, and all the variables

-7n+35=0

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

-7n=-35

n=-35/-7

n=+5

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