3n-9=4n+4

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Solution for 3n-9=4n+4 equation: 



3n-9=4n+4

We move all terms to the left:

3n-9-(4n+4)=0

We get rid of parentheses

3n-4n-4-9=0

We add all the numbers together, and all the variables

-1n-13=0

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

-n=13

n=13/-1

n=-13

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