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6-2/3(6b-9)=5b-21
We move all terms to the left:
6-2/3(6b-9)-(5b-21)=0
Domain of the equation: 3(6b-9)!=0We get rid of parentheses
b∈R
-2/3(6b-9)-5b+21+6=0
We multiply all the terms by the denominator
-5b*3(6b-9)+21*3(6b-9)+6*3(6b-9)-2=0
Wy multiply elements
-15b^2(6+63b(6+18b(6-2=0
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