(4x-20)/(3x-15)

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Solution for (4x-20)/(3x-15) equation: 


D( x )

3*x-15 = 0

3*x-15 = 0

3*x-15 = 0

3*x-15 = 0 // + 15

3*x = 15 // : 3

x = 15/3

x = 5

x in (-oo:5) U (5:+oo)

(4*x-20)/(3*x-15) = 0

4*x-20 = 0 // + 20

4*x = 20 // : 4

x = 20/4

x = 5

x in { 5} 

x belongs to the empty set

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