20/4=8/x

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Solution for 20/4=8/x equation: 


D( x )

x = 0

x = 0

x = 0

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

20/4 = 8/x // - 8/x

20/4-(8/x) = 0

20/4-8*x^-1 = 0

-8*x^-1 = -5 // : -8

x^-1 = 5/8

-1 < 0

1/(x^1) = 5/8 // * x^1

1 = 5/8*x^1 // : 5/8

8/5 = x^1

x = 8/5

x = 8/5

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