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2.5(2b-18)=49b-9b
We move all terms to the left:
2.5(2b-18)-(49b-9b)=0
We add all the numbers together, and all the variables
2.5(2b-18)-(+40b)=0
We multiply parentheses
5b-(+40b)-45=0
We get rid of parentheses
5b-40b-45=0
We add all the numbers together, and all the variables
-35b-45=0
We move all terms containing b to the left, all other terms to the right
-35b=45
b=45/-35
b=-1+2/7
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