39=27/b

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Solution for 39=27/b equation: 


D( b )

b = 0

b = 0

b = 0

b in (-oo:0) U (0:+oo)

39 = 27/b // - 27/b

39-(27/b) = 0

39-27*b^-1 = 0

-27*b^-1 = -39 // : -27

b^-1 = 13/9

-1 < 0

1/(b^1) = 13/9 // * b^1

1 = 13/9*b^1 // : 13/9

9/13 = b^1

b = 9/13

b = 9/13

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