15=70/x

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Solution for 15=70/x equation: 


D( x )

x = 0

x = 0

x = 0

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

15 = 70/x // - 70/x

15-(70/x) = 0

15-70*x^-1 = 0

-70*x^-1 = -15 // : -70

x^-1 = 3/14

-1 < 0

1/(x^1) = 3/14 // * x^1

1 = 3/14*x^1 // : 3/14

14/3 = x^1

x = 14/3

x = 14/3

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