12x-7=9x+20

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Solution for 12x-7=9x+20 equation: 



12x-7=9x+20

We move all terms to the left:

12x-7-(9x+20)=0

We get rid of parentheses

12x-9x-20-7=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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