-9/(x-9)=9

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


D( x )

x-9 = 0

x-9 = 0

x-9 = 0

x-9 = 0 // + 9

x = 9

x in (-oo:9) U (9:+oo)

-9/(x-9) = 9 // - 9

-9/(x-9)-9 = 0

(-9*(x-9))/(x-9)-9/(x-9) = 0

-9*(x-9)-9 = 0

72-9*x = 0

(72-9*x)/(x-9) = 0

(72-9*x)/(x-9) = 0 // * x-9

72-9*x = 0

72-9*x = 0 // - 72

-9*x = -72 // : -9

x = -72/(-9)

x = 8

x = 8

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