(x-5)/(x-4)=9/8

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Solution for (x-5)/(x-4)=9/8 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)

(x-5)/(x-4) = 9/8 // - 9/8

(x-5)/(x-4)-(9/8) = 0

(x-5)/(x-4)-9/8 = 0

(8*(x-5))/(8*(x-4))+(-9*(x-4))/(8*(x-4)) = 0

8*(x-5)-9*(x-4) = 0

-x-4 = 0

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

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

-x-4 = 0

-x-4 = 0 // + 4

-x = 4 // * -1

x = -4

x = -4

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