6n-12=3n+15

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Solution for 6n-12=3n+15 equation: 



6n-12=3n+15

We move all terms to the left:

6n-12-(3n+15)=0

We get rid of parentheses

6n-3n-15-12=0

We add all the numbers together, and all the variables

3n-27=0

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

3n=27

n=27/3

n=9

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