12x-132=21x+309

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Solution for 12x-132=21x+309 equation: 



12x-132=21x+309

We move all terms to the left:

12x-132-(21x+309)=0

We get rid of parentheses

12x-21x-309-132=0

We add all the numbers together, and all the variables

-9x-441=0

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

-9x=441

x=441/-9

x=-49

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