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12x-9=3x-8+9x
We move all terms to the left:
12x-9-(3x-8+9x)=0
We add all the numbers together, and all the variables
12x-(12x-8)-9=0
We get rid of parentheses
12x-12x+8-9=0
We add all the numbers together, and all the variables
-1!=0
There is no solution for this equation
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