(9x-6)/(21x-14)

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Solution for (9x-6)/(21x-14) equation: 


D( x )

21*x-14 = 0

21*x-14 = 0

21*x-14 = 0

21*x-14 = 0 // + 14

21*x = 14 // : 21

x = 14/21

x = 2/3

x in (-oo:2/3) U (2/3:+oo)

(9*x-6)/(21*x-14) = 0

9*x-6 = 0 // + 6

9*x = 6 // : 9

x = 6/9

x = 2/3

x in { 2/3} 

x belongs to the empty set

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