-3n+(4n+15)=-21

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Solution for -3n+(4n+15)=-21 equation: 



-3n+(4n+15)=-21

We move all terms to the left:

-3n+(4n+15)-(-21)=0

We add all the numbers together, and all the variables

-3n+(4n+15)+21=0

We get rid of parentheses

-3n+4n+15+21=0

We add all the numbers together, and all the variables

n+36=0

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

n=-36

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