9/15=125/x

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Solution for 9/15=125/x equation: 


D( x )

x = 0

x = 0

x = 0

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

9/15 = 125/x // - 125/x

9/15-(125/x) = 0

9/15-125*x^-1 = 0

-125*x^-1 = -3/5 // : -125

x^-1 = 3/625

-1 < 0

1/(x^1) = 3/625 // * x^1

1 = 3/625*x^1 // : 3/625

625/3 = x^1

x = 625/3

x = 625/3

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