4/x=7/-5x

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Solution for 4/x=7/-5x equation: 


D( x )

x = 0

x = 0

x = 0

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

4/x = (7/(-5))*x // - (7/(-5))*x

4/x-((7/(-5))*x) = 0

(7/5)*x+4/x = 0

7/5*x^1+4*x^-1 = 0

(7/5*x^2+4*x^0)/(x^1) = 0 // * x^2

x^1*(7/5*x^2+4*x^0) = 0

x^1

(7/5)*x^2+4 = 0

(7/5)*x^2+4 = 0

DELTA = 0^2-(4*4*(7/5))

DELTA = -112/5

DELTA < 0

x in { } 

x belongs to the empty set

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