-3=-12/b

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Solution for -3=-12/b equation: 


D( b )

b = 0

b = 0

b = 0

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

-3 = -12/b // + -12/b

-(-12/b)-3 = 0

12*b^-1-3 = 0

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

b^-1 = 1/4

-1 < 0

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

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

4 = b^1

b = 4

b = 4

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