12/15=18/b

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Solution for 12/15=18/b equation: 


D( b )

b = 0

b = 0

b = 0

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

12/15 = 18/b // - 18/b

12/15-(18/b) = 0

12/15-18*b^-1 = 0

-18*b^-1 = -4/5 // : -18

b^-1 = 2/45

-1 < 0

1/(b^1) = 2/45 // * b^1

1 = 2/45*b^1 // : 2/45

45/2 = b^1

b = 45/2

b = 45/2

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