-57=-12-3x

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



-57=-12-3x

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

3x+12-57=0

We add all the numbers together, and all the variables

3x-45=0

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

3x=45

x=45/3

x=15

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