15/30=3/x

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Solution for 15/30=3/x equation: 


D( x )

x = 0

x = 0

x = 0

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

15/30 = 3/x // - 3/x

15/30-(3/x) = 0

15/30-3*x^-1 = 0

-3*x^-1 = -1/2 // : -3

x^-1 = 1/6

-1 < 0

1/(x^1) = 1/6 // * x^1

1 = 1/6*x^1 // : 1/6

6 = x^1

x = 6

x = 6

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