4/15=5/X

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Solution for 4/15=5/X equation: 


D( X )

X = 0

X = 0

X = 0

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

4/15 = 5/X // - 5/X

4/15-(5/X) = 0

4/15-5*X^-1 = 0

-5*X^-1 = -4/15 // : -5

X^-1 = 4/75

-1 < 0

1/(X^1) = 4/75 // * X^1

1 = 4/75*X^1 // : 4/75

75/4 = X^1

X = 75/4

X = 75/4

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