-6n=21-3n

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Solution for -6n=21-3n equation: 



-6n=21-3n

We move all terms to the left:

-6n-(21-3n)=0

We add all the numbers together, and all the variables

-6n-(-3n+21)=0

We get rid of parentheses

-6n+3n-21=0

We add all the numbers together, and all the variables

-3n-21=0

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

-3n=21

n=21/-3

n=-7

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