(x-5)/(x-18)-3

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Solution for (x-5)/(x-18)-3 equation: 


D( x )

x-18 = 0

x-18 = 0

x-18 = 0

x-18 = 0 // + 18

x = 18

x in (-oo:18) U (18:+oo)

(x-5)/(x-18)-3 = 0

(x-5)/(x-18)+(-3*(x-18))/(x-18) = 0

x-3*(x-18)-5 = 0

49-2*x = 0

(49-2*x)/(x-18) = 0

(49-2*x)/(x-18) = 0 // * x-18

49-2*x = 0

49-2*x = 0 // - 49

-2*x = -49 // : -2

x = -49/(-2)

x = 49/2

x = 49/2

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