12x-7-3x=20

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Solution for 12x-7-3x=20 equation: 



12x-7-3x=20

We move all terms to the left:

12x-7-3x-(20)=0

We add all the numbers together, and all the variables

9x-27=0

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

9x=27

x=27/9

x=3

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