3/5-4/x

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Solution for 3/5-4/x equation: 


D( x )

x = 0

x = 0

x = 0

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

3/5-(4/x) = 0

3/5-4*x^-1 = 0

-4*x^-1 = -3/5 // : -4

x^-1 = 3/20

-1 < 0

1/(x^1) = 3/20 // * x^1

1 = 3/20*x^1 // : 3/20

20/3 = x^1

x = 20/3

x = 20/3

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