3/1=15/X

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Solution for 3/1=15/X equation: 


D( X )

X = 0

X = 0

X = 0

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

3/1 = 15/X // - 15/X

3/1-(15/X) = 0

3-15*X^-1 = 0

-15*X^-1 = -3 // : -15

X^-1 = 1/5

-1 < 0

1/(X^1) = 1/5 // * X^1

1 = 1/5*X^1 // : 1/5

5 = X^1

X = 5

X = 5

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