9/(x-4)=1

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Solution for 9/(x-4)=1 equation: 


D( x )

x-4 = 0

x-4 = 0

x-4 = 0

x-4 = 0 // + 4

x = 4

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

9/(x-4) = 1 // - 1

9/(x-4)-1 = 0

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

9-1*(x-4) = 0

13-x = 0

(13-x)/(x-4) = 0

(13-x)/(x-4) = 0 // * x-4

13-x = 0

13-x = 0 // - 13

-x = -13 // * -1

x = 13

x = 13

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