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(2b-9)+b+(1.5(b+2)=75
We move all terms to the left:
(2b-9)+b+(1.5(b+2)-(75)=0
We add all the numbers together, and all the variables
b+(2b-9)+(1.5(b+2)-75=0
We get rid of parentheses
b+2b+(1.5(b+2)-75-9=0
We add all the numbers together, and all the variables
3b+(1.5(b+2)-75-9=0
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