-12=-57-3n

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Solution for -12=-57-3n equation: 



-12=-57-3n

We move all terms to the left:

-12-(-57-3n)=0

We add all the numbers together, and all the variables

-(-3n-57)-12=0

We get rid of parentheses

3n+57-12=0

We add all the numbers together, and all the variables

3n+45=0

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

3n=-45

n=-45/3

n=-15

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