-15-5n=7(n+3)=

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Solution for -15-5n=7(n+3)= equation: 



-15-5n=7(n+3)=

We move all terms to the left:

-15-5n-(7(n+3))=0



We calculate terms in parentheses: -(7(n+3)), so:

7(n+3)

We multiply parentheses

7n+21

Back to the equation:

-(7n+21)



We get rid of parentheses

-5n-7n-21-15=0

We add all the numbers together, and all the variables

-12n-36=0

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

-12n=36

n=36/-12

n=-3

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