(4x-9)/(8-x)

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Solution for (4x-9)/(8-x) equation: 


D( x )

8-x = 0

8-x = 0

8-x = 0

8-x = 0 // - 8

-x = -8 // * -1

x = 8

x in (-oo:8) U (8:+oo)

(4*x-9)/(8-x) = 0

4*x-9 = 0 // + 9

4*x = 9 // : 4

x = 9/4

x = 9/4

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