12x-207=-9x+108

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Solution for 12x-207=-9x+108 equation: 



12x-207=-9x+108

We move all terms to the left:

12x-207-(-9x+108)=0

We get rid of parentheses

12x+9x-108-207=0

We add all the numbers together, and all the variables

21x-315=0

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

21x=315

x=315/21

x=15

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