(21/x)-(20/x-3)+2=0

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Solution for (21/x)-(20/x-3)+2=0 equation: 


D( x )

x = 0

x = 0

x = 0

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

21/x-(20/x)+2+3 = 0

21/x-20*x^-1+2+3 = 0

1*x^-1 = -5 // : 1

x^-1 = -5

-1 < 0

1/(x^1) = -5 // * x^1

1 = -5*x^1 // : -5

-1/5 = x^1

x = -1/5

x = -1/5

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