15/7=4/x

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Solution for 15/7=4/x equation: 


D( x )

x = 0

x = 0

x = 0

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

15/7 = 4/x // - 4/x

15/7-(4/x) = 0

15/7-4*x^-1 = 0

-4*x^-1 = -15/7 // : -4

x^-1 = 15/28

-1 < 0

1/(x^1) = 15/28 // * x^1

1 = 15/28*x^1 // : 15/28

28/15 = x^1

x = 28/15

x = 28/15

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