X=x/(9x-4)

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


D( x )

9*x-4 = 0

9*x-4 = 0

9*x-4 = 0

9*x-4 = 0 // + 4

9*x = 4 // : 9

x = 4/9

x in (-oo:4/9) U (4/9:+oo)

X = x/(9*x-4) // - x/(9*x-4)

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

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

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

X*(9*x-4)-1*x = 0

9*X*x-4*X-x = 0

9*X*x-4*X-x = 0

9*X*x-4*X = 0 // + -4*X

9*X*x = -(-4*X) // : 9*X

x = (-(-4*X))/(9*X)

x = 4/9

x-4/9 = 0

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

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

x-4/9 = 0

x-4/9 = 0 // + 4/9

x = 4/9

x in { 4/9} 

x belongs to the empty set

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