7n-7=3n+9

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



7n-7=3n+9

We move all terms to the left:

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

We get rid of parentheses

7n-3n-9-7=0

We add all the numbers together, and all the variables

4n-16=0

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

4n=16

n=16/4

n=4

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