9/b=4/5

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Solution for 9/b=4/5 equation: 


D( b )

b = 0

b = 0

b = 0

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

9/b = 4/5 // - 4/5

9/b-(4/5) = 0

9/b-4/5 = 0

9*b^-1 = 4/5 // : 9

b^-1 = 4/45

-1 < 0

1/(b^1) = 4/45 // * b^1

1 = 4/45*b^1 // : 4/45

45/4 = b^1

b = 45/4

b = 45/4

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