(x-5)/(x+4)=(x+5)/(x-4)

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Solution for (x-5)/(x+4)=(x+5)/(x-4) equation: 


D( x )

x+4 = 0

x-4 = 0

x+4 = 0

x+4 = 0

x+4 = 0 // - 4

x = -4

x-4 = 0

x-4 = 0

x-4 = 0 // + 4

x = 4

x in (-oo:-4) U (-4:4) U (4:+oo)

(x-5)/(x+4) = (x+5)/(x-4) // - (x+5)/(x-4)

(x-5)/(x+4)-((x+5)/(x-4)) = 0

(x-5)/(x+4)+(-1*(x+5))/(x-4) = 0

((x-5)*(x-4))/((x+4)*(x-4))+(-1*(x+5)*(x+4))/((x+4)*(x-4)) = 0

(x-5)*(x-4)-1*(x+5)*(x+4) = 0

-18*x = 0

(-18*x)/((x+4)*(x-4)) = 0

(-18*x)/((x+4)*(x-4)) = 0 // * (x+4)*(x-4)

-18*x = 0

-18*x = 0 // : -18

x = 0

x = 0

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