4/b-3.9=2/b+1

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Solution for 4/b-3.9=2/b+1 equation: 



4/b-3.9=2/b+1

We move all terms to the left:

4/b-3.9-(2/b+1)=0



Domain of the equation: b!=0

b∈R





Domain of the equation: b+1)!=0

b∈R



We get rid of parentheses

4/b-2/b-1-3.9=0

We multiply all the terms by the denominator


-1*b-(3.9)*b+4-2=0

We add all the numbers together, and all the variables

-1b-(3.9)*b+2=0

We multiply parentheses

-1b-3.9b+2=0

We add all the numbers together, and all the variables

-4.9b+2=0

We move all terms containing b to the left, all other terms to the right

-4.9b=-2

b=-2/-4.9

b=1/2.45

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