3/12=5/x

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Solution for 3/12=5/x equation: 


D( x )

x = 0

x = 0

x = 0

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

3/12 = 5/x // - 5/x

3/12-(5/x) = 0

3/12-5*x^-1 = 0

-5*x^-1 = -1/4 // : -5

x^-1 = 1/20

-1 < 0

1/(x^1) = 1/20 // * x^1

1 = 1/20*x^1 // : 1/20

20 = x^1

x = 20

x = 20

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