(7x+9)/(9x-7)+(9x)/(9x-7)

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Solution for (7x+9)/(9x-7)+(9x)/(9x-7) equation: 


D( x )

9*x-7 = 0

9*x-7 = 0

9*x-7 = 0

9*x-7 = 0 // + 7

9*x = 7 // : 9

x = 7/9

x in (-oo:7/9) U (7/9:+oo)

(7*x+9)/(9*x-7)+(9*x)/(9*x-7) = 0

7*x+9*x+9 = 0

16*x+9 = 0

(16*x+9)/(9*x-7) = 0

(16*x+9)/(9*x-7) = 0 // * 9*x-7

16*x+9 = 0

16*x+9 = 0 // - 9

16*x = -9 // : 16

x = -9/16

x = -9/16

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