20/(9x-4)=4

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Solution for 20/(9x-4)=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)

20/(9*x-4) = 4 // - 4

20/(9*x-4)-4 = 0

20/(9*x-4)+(-4*(9*x-4))/(9*x-4) = 0

20-4*(9*x-4) = 0

36-36*x = 0

(36-36*x)/(9*x-4) = 0

(36-36*x)/(9*x-4) = 0 // * 9*x-4

36-36*x = 0

36-36*x = 0 // - 36

-36*x = -36 // : -36

x = -36/(-36)

x = 1

x = 1

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