-3(n+3)=21

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



-3(n+3)=21

We move all terms to the left:

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

We multiply parentheses

-3n-9-21=0

We add all the numbers together, and all the variables

-3n-30=0

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

-3n=30

n=30/-3

n=-10

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