-6n+9=-3n-21-6

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Solution for -6n+9=-3n-21-6 equation: 



-6n+9=-3n-21-6

We move all terms to the left:

-6n+9-(-3n-21-6)=0

We add all the numbers together, and all the variables

-6n-(-3n-27)+9=0

We get rid of parentheses

-6n+3n+27+9=0

We add all the numbers together, and all the variables

-3n+36=0

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

-3n=-36

n=-36/-3

n=+12

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