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6x+6+3x+9=2x+7x+12
We move all terms to the left:
6x+6+3x+9-(2x+7x+12)=0
We add all the numbers together, and all the variables
6x+3x-(9x+12)+6+9=0
We add all the numbers together, and all the variables
9x-(9x+12)+15=0
We get rid of parentheses
9x-9x-12+15=0
We add all the numbers together, and all the variables
3!=0
There is no solution for this equation
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