5/4=20/x

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Solution for 5/4=20/x equation: 


D( x )

x = 0

x = 0

x = 0

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

5/4 = 20/x // - 20/x

5/4-(20/x) = 0

5/4-20*x^-1 = 0

-20*x^-1 = -5/4 // : -20

x^-1 = 1/16

-1 < 0

1/(x^1) = 1/16 // * x^1

1 = 1/16*x^1 // : 1/16

16 = x^1

x = 16

x = 16

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