12/b=20/15

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Solution for 12/b=20/15 equation: 


D( b )

b = 0

b = 0

b = 0

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

12/b = 20/15 // - 20/15

12/b-(20/15) = 0

12/b-4/3 = 0

12*b^-1 = 4/3 // : 12

b^-1 = 1/9

-1 < 0

1/(b^1) = 1/9 // * b^1

1 = 1/9*b^1 // : 1/9

9 = b^1

b = 9

b = 9

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