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45/b=9
We move all terms to the left:
45/b-(9)=0
Domain of the equation: b!=0We multiply all the terms by the denominator
b∈R
-9*b+45=0
We add all the numbers together, and all the variables
-9b+45=0
We move all terms containing b to the left, all other terms to the right
-9b=-45
b=-45/-9
b=+5
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