840=300/x

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Solution for 840=300/x equation: 


D( x )

x = 0

x = 0

x = 0

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

840 = 300/x // - 300/x

840-(300/x) = 0

840-300*x^-1 = 0

-300*x^-1 = -840 // : -300

x^-1 = 14/5

-1 < 0

1/(x^1) = 14/5 // * x^1

1 = 14/5*x^1 // : 14/5

5/14 = x^1

x = 5/14

x = 5/14

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