3/21=2/x

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Solution for 3/21=2/x equation: 


D( x )

x = 0

x = 0

x = 0

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

3/21 = 2/x // - 2/x

3/21-(2/x) = 0

3/21-2*x^-1 = 0

-2*x^-1 = -1/7 // : -2

x^-1 = 1/14

-1 < 0

1/(x^1) = 1/14 // * x^1

1 = 1/14*x^1 // : 1/14

14 = x^1

x = 14

x = 14

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