8/12=7/b

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Solution for 8/12=7/b equation: 


D( b )

b = 0

b = 0

b = 0

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

8/12 = 7/b // - 7/b

8/12-(7/b) = 0

8/12-7*b^-1 = 0

-7*b^-1 = -2/3 // : -7

b^-1 = 2/21

-1 < 0

1/(b^1) = 2/21 // * b^1

1 = 2/21*b^1 // : 2/21

21/2 = b^1

b = 21/2

b = 21/2

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