12-2n=5n-9

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Solution for 12-2n=5n-9 equation: 



12-2n=5n-9

We move all terms to the left:

12-2n-(5n-9)=0

We get rid of parentheses

-2n-5n+9+12=0

We add all the numbers together, and all the variables

-7n+21=0

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

-7n=-21

n=-21/-7

n=+3

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