3/0.8=12/b

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Solution for 3/0.8=12/b equation: 


D( b )

b = 0

b = 0

b = 0

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

3/0.8 = 12/b // - 12/b

3/0.8-(12/b) = 0

3/0.8-12*b^-1 = 0

-12*b^-1 = -3.75 // : -12

b^-1 = 0.3125

-1 < 0

1/(b^1) = 0.3125 // * b^1

1 = 0.3125*b^1 // : 0.3125

3.2 = b^1

b = 3.2

b = 3.2

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