(2x-14)/(3x-21)

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Solution for (2x-14)/(3x-21) equation: 


D( x )

3*x-21 = 0

3*x-21 = 0

3*x-21 = 0

3*x-21 = 0 // + 21

3*x = 21 // : 3

x = 21/3

x = 7

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

(2*x-14)/(3*x-21) = 0

2*x-14 = 0 // + 14

2*x = 14 // : 2

x = 14/2

x = 7

x in { 7} 

x belongs to the empty set

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