21/b=147/105

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Solution for 21/b=147/105 equation: 


D( b )

b = 0

b = 0

b = 0

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

21/b = 147/105 // - 147/105

21/b-(147/105) = 0

21/b-7/5 = 0

21*b^-1 = 7/5 // : 21

b^-1 = 1/15

-1 < 0

1/(b^1) = 1/15 // * b^1

1 = 1/15*b^1 // : 1/15

15 = b^1

b = 15

b = 15

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