45=3n-9

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Solution for 45=3n-9 equation: 



45=3n-9

We move all terms to the left:

45-(3n-9)=0

We get rid of parentheses

-3n+9+45=0

We add all the numbers together, and all the variables

-3n+54=0

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

-3n=-54

n=-54/-3

n=+18

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