14/18=21/b

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Solution for 14/18=21/b equation: 


D( b )

b = 0

b = 0

b = 0

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

14/18 = 21/b // - 21/b

14/18-(21/b) = 0

14/18-21*b^-1 = 0

-21*b^-1 = -7/9 // : -21

b^-1 = 1/27

-1 < 0

1/(b^1) = 1/27 // * b^1

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

27 = b^1

b = 27

b = 27

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