12x-12=-9x

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Solution for 12x-12=-9x equation: 



12x-12=-9x

We move all terms to the left:

12x-12-(-9x)=0

We get rid of parentheses

12x+9x-12=0

We add all the numbers together, and all the variables

21x-12=0

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

21x=12

x=12/21

x=4/7

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