12/21=56/x

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Solution for 12/21=56/x equation: 


D( x )

x = 0

x = 0

x = 0

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

12/21 = 56/x // - 56/x

12/21-(56/x) = 0

12/21-56*x^-1 = 0

-56*x^-1 = -4/7 // : -56

x^-1 = 1/98

-1 < 0

1/(x^1) = 1/98 // * x^1

1 = 1/98*x^1 // : 1/98

98 = x^1

x = 98

x = 98

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