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