-20-(-50)=9/x

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Solution for -20-(-50)=9/x equation: 


D( x )

x = 0

x = 0

x = 0

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

50-20 = 9/x // - 9/x

50-(9/x)-20 = 0

50-9*x^-1-20 = 0

-9*x^-1 = -30 // : -9

x^-1 = 10/3

-1 < 0

1/(x^1) = 10/3 // * x^1

1 = 10/3*x^1 // : 10/3

3/10 = x^1

x = 3/10

x = 3/10

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