-7(-n-3)=3(n+3)

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Solution for -7(-n-3)=3(n+3) equation: 



-7(-n-3)=3(n+3)

We move all terms to the left:

-7(-n-3)-(3(n+3))=0

We add all the numbers together, and all the variables

-7(-1n-3)-(3(n+3))=0

We multiply parentheses

7n-(3(n+3))+21=0



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

3(n+3)

We multiply parentheses

3n+9

Back to the equation:

-(3n+9)



We get rid of parentheses

7n-3n-9+21=0

We add all the numbers together, and all the variables

4n+12=0

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

4n=-12

n=-12/4

n=-3

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