9n-45=12n-15

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Solution for 9n-45=12n-15 equation: 



9n-45=12n-15

We move all terms to the left:

9n-45-(12n-15)=0

We get rid of parentheses

9n-12n+15-45=0

We add all the numbers together, and all the variables

-3n-30=0

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

-3n=30

n=30/-3

n=-10

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