9+6n=-3(4+5n)

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Solution for 9+6n=-3(4+5n) equation: 



9+6n=-3(4+5n)

We move all terms to the left:

9+6n-(-3(4+5n))=0

We add all the numbers together, and all the variables

6n-(-3(5n+4))+9=0



We calculate terms in parentheses: -(-3(5n+4)), so:

-3(5n+4)

We multiply parentheses

-15n-12

Back to the equation:

-(-15n-12)



We get rid of parentheses

6n+15n+12+9=0

We add all the numbers together, and all the variables

21n+21=0

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

21n=-21

n=-21/21

n=-1

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