7=9n-4n

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Solution for 7=9n-4n equation: 



7=9n-4n

We move all terms to the left:

7-(9n-4n)=0

We add all the numbers together, and all the variables

-(+5n)+7=0

We get rid of parentheses

-5n+7=0

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

-5n=-7

n=-7/-5

n=1+2/5

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