4/2=5/b+10

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Solution for 4/2=5/b+10 equation: 


D( b )

b = 0

b = 0

b = 0

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

4/2 = 5/b+10 // - 5/b+10

4/2-(5/b)-10 = 0

4/2-5*b^-1-10 = 0

-5*b^-1 = 8 // : -5

b^-1 = -8/5

-1 < 0

1/(b^1) = -8/5 // * b^1

1 = -8/5*b^1 // : -8/5

-5/8 = b^1

b = -5/8

b = -5/8

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