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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

6n-(-3n-30)+9=0

We get rid of parentheses

6n+3n+30+9=0

We add all the numbers together, and all the variables

9n+39=0

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

9n=-39

n=-39/9

n=-4+1/3

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