7/2=3/b-4

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Solution for 7/2=3/b-4 equation: 


D( b )

b = 0

b = 0

b = 0

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

7/2 = 3/b-4 // - 3/b-4

7/2-(3/b)+4 = 0

7/2-3*b^-1+4 = 0

-3*b^-1 = -15/2 // : -3

b^-1 = 5/2

-1 < 0

1/(b^1) = 5/2 // * b^1

1 = 5/2*b^1 // : 5/2

2/5 = b^1

b = 2/5

b = 2/5

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