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3x+2.5=12x-9x+15
We move all terms to the left:
3x+2.5-(12x-9x+15)=0
We add all the numbers together, and all the variables
3x-(3x+15)+2.5=0
We get rid of parentheses
3x-3x-15+2.5=0
We add all the numbers together, and all the variables
-12.5!=0
There is no solution for this equation
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