9x/(x-4)-2

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Solution for 9x/(x-4)-2 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)/(x-4)-2 = 0

(9*x)/(x-4)+(-2*(x-4))/(x-4) = 0

9*x-2*(x-4) = 0

7*x+8 = 0

(7*x+8)/(x-4) = 0

(7*x+8)/(x-4) = 0 // * x-4

7*x+8 = 0

7*x+8 = 0 // - 8

7*x = -8 // : 7

x = -8/7

x = -8/7

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