-663=6n+9(-9n-7)

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Solution for -663=6n+9(-9n-7) equation: 



-663=6n+9(-9n-7)

We move all terms to the left:

-663-(6n+9(-9n-7))=0



We calculate terms in parentheses: -(6n+9(-9n-7)), so:

6n+9(-9n-7)

We multiply parentheses

6n-81n-63

We add all the numbers together, and all the variables

-75n-63

Back to the equation:

-(-75n-63)



We get rid of parentheses

75n+63-663=0

We add all the numbers together, and all the variables

75n-600=0

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

75n=600

n=600/75

n=8

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