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-9/b=-3
We move all terms to the left:
-9/b-(-3)=0
Domain of the equation: b!=0We add all the numbers together, and all the variables
b∈R
-9/b+3=0
We multiply all the terms by the denominator
3*b-9=0
We add all the numbers together, and all the variables
3b-9=0
We move all terms containing b to the left, all other terms to the right
3b=9
b=9/3
b=3
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