3/5=9/x

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Solution for 3/5=9/x equation: 


D( x )

x = 0

x = 0

x = 0

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

3/5 = 9/x // - 9/x

3/5-(9/x) = 0

3/5-9*x^-1 = 0

-9*x^-1 = -3/5 // : -9

x^-1 = 1/15

-1 < 0

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

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

15 = x^1

x = 15

x = 15

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