9n+3n=8(n-12)-3(n-11)

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Solution for 9n+3n=8(n-12)-3(n-11) equation: 



9n+3n=8(n-12)-3(n-11)

We move all terms to the left:

9n+3n-(8(n-12)-3(n-11))=0

We add all the numbers together, and all the variables

12n-(8(n-12)-3(n-11))=0



We calculate terms in parentheses: -(8(n-12)-3(n-11)), so:

8(n-12)-3(n-11)

We multiply parentheses

8n-3n-96+33

We add all the numbers together, and all the variables

5n-63

Back to the equation:

-(5n-63)



We get rid of parentheses

12n-5n+63=0

We add all the numbers together, and all the variables

7n+63=0

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

7n=-63

n=-63/7

n=-9

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