129=-57-6x

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Solution for 129=-57-6x equation: 



129=-57-6x

We move all terms to the left:

129-(-57-6x)=0

We add all the numbers together, and all the variables

-(-6x-57)+129=0

We get rid of parentheses

6x+57+129=0

We add all the numbers together, and all the variables

6x+186=0

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

6x=-186

x=-186/6

x=-31

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