9/15=3/b

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Solution for 9/15=3/b equation: 


D( b )

b = 0

b = 0

b = 0

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

9/15 = 3/b // - 3/b

9/15-(3/b) = 0

9/15-3*b^-1 = 0

-3*b^-1 = -3/5 // : -3

b^-1 = 1/5

-1 < 0

1/(b^1) = 1/5 // * b^1

1 = 1/5*b^1 // : 1/5

5 = b^1

b = 5

b = 5

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