6/b-1=9/7

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Solution for 6/b-1=9/7 equation: 


D( b )

b = 0

b = 0

b = 0

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

6/b-1 = 9/7 // - 9/7

6/b-(9/7)-1 = 0

6/b-9/7-1 = 0

6*b^-1 = 16/7 // : 6

b^-1 = 8/21

-1 < 0

1/(b^1) = 8/21 // * b^1

1 = 8/21*b^1 // : 8/21

21/8 = b^1

b = 21/8

b = 21/8

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