x+21/x+13=x+13/x

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Solution for x+21/x+13=x+13/x equation: 


D( x )

x = 0

x = 0

x = 0

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

x+21/x+13 = x+13/x // - x+13/x

x-x+21/x-(13/x)+13 = 0

x-x+21/x-13*x^-1+13 = 0

8*x^-1 = -13 // : 8

x^-1 = -13/8

-1 < 0

1/(x^1) = -13/8 // * x^1

1 = -13/8*x^1 // : -13/8

-8/13 = x^1

x = -8/13

x = -8/13

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