12(n+9)+9n=-4n-(-5n-8)

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Solution for 12(n+9)+9n=-4n-(-5n-8) equation: 



12(n+9)+9n=-4n-(-5n-8)

We move all terms to the left:

12(n+9)+9n-(-4n-(-5n-8))=0

We add all the numbers together, and all the variables

9n+12(n+9)-(-4n-(-5n-8))=0

We multiply parentheses

9n+12n-(-4n-(-5n-8))+108=0



We calculate terms in parentheses: -(-4n-(-5n-8)), so:

-4n-(-5n-8)

We get rid of parentheses

-4n+5n+8

We add all the numbers together, and all the variables

n+8

Back to the equation:

-(n+8)



We add all the numbers together, and all the variables

21n-(n+8)+108=0

We get rid of parentheses

21n-n-8+108=0

We add all the numbers together, and all the variables

20n+100=0

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

20n=-100

n=-100/20

n=-5

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