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6/b-9=4/b+5
We move all terms to the left:
6/b-9-(4/b+5)=0
Domain of the equation: b!=0
b∈R
Domain of the equation: b+5)!=0We get rid of parentheses
b∈R
6/b-4/b-5-9=0
We multiply all the terms by the denominator
-5*b-9*b+6-4=0
We add all the numbers together, and all the variables
-14b+2=0
We move all terms containing b to the left, all other terms to the right
-14b=-2
b=-2/-14
b=1/7
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