3n-15=7n+9

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Solution for 3n-15=7n+9 equation: 



3n-15=7n+9

We move all terms to the left:

3n-15-(7n+9)=0

We get rid of parentheses

3n-7n-9-15=0

We add all the numbers together, and all the variables

-4n-24=0

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

-4n=24

n=24/-4

n=-6

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