-n=9-4n

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Solution for -n=9-4n equation: 



-n=9-4n

We move all terms to the left:

-n-(9-4n)=0

We add all the numbers together, and all the variables

-n-(-4n+9)=0

We add all the numbers together, and all the variables

-1n-(-4n+9)=0

We get rid of parentheses

-1n+4n-9=0

We add all the numbers together, and all the variables

3n-9=0

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

3n=9

n=9/3

n=3

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