3n-9=7n+3

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Solution for 3n-9=7n+3 equation: 



3n-9=7n+3

We move all terms to the left:

3n-9-(7n+3)=0

We get rid of parentheses

3n-7n-3-9=0

We add all the numbers together, and all the variables

-4n-12=0

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

-4n=12

n=12/-4

n=-3

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