30=57-3x

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Solution for 30=57-3x equation: 



30=57-3x

We move all terms to the left:

30-(57-3x)=0

We add all the numbers together, and all the variables

-(-3x+57)+30=0

We get rid of parentheses

3x-57+30=0

We add all the numbers together, and all the variables

3x-27=0

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

3x=27

x=27/3

x=9

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