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-12x+9=3+4x-12-16x
We move all terms to the left:
-12x+9-(3+4x-12-16x)=0
We add all the numbers together, and all the variables
-12x-(-12x-9)+9=0
We get rid of parentheses
-12x+12x+9+9=0
We add all the numbers together, and all the variables
18!=0
There is no solution for this equation
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