4n+12=7n-9

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Solution for 4n+12=7n-9 equation: 



4n+12=7n-9

We move all terms to the left:

4n+12-(7n-9)=0

We get rid of parentheses

4n-7n+9+12=0

We add all the numbers together, and all the variables

-3n+21=0

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

-3n=-21

n=-21/-3

n=+7

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