20/30=5/x

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Solution for 20/30=5/x equation: 


D( x )

x = 0

x = 0

x = 0

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

20/30 = 5/x // - 5/x

20/30-(5/x) = 0

20/30-5*x^-1 = 0

-5*x^-1 = -2/3 // : -5

x^-1 = 2/15

-1 < 0

1/(x^1) = 2/15 // * x^1

1 = 2/15*x^1 // : 2/15

15/2 = x^1

x = 15/2

x = 15/2

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