42/b=200/100

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Solution for 42/b=200/100 equation: 


D( b )

b = 0

b = 0

b = 0

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

42/b = 200/100 // - 200/100

42/b-(200/100) = 0

42/b-2 = 0

42*b^-1 = 2 // : 42

b^-1 = 1/21

-1 < 0

1/(b^1) = 1/21 // * b^1

1 = 1/21*b^1 // : 1/21

21 = b^1

b = 21

b = 21

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