((5y-20)/20)/((6y-24)/4)

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Solution for ((5y-20)/20)/((6y-24)/4) equation: 


D( y )

(6*y-24)/4 = 0

(6*y-24)/4 = 0

(6*y-24)/4 = 0

6*y-24 = 0 // + 24

6*y = 24 // : 6

y = 24/6

y = 4

y in (-oo:4) U (4:+oo)

((5*y-20)/20)/((6*y-24)/4) = 0

(4*(5*y-20))/(20*(6*y-24)) = 0

5*y-20 = 0 // + 20

5*y = 20 // : 5

y = 20/5

y = 4

y in { 4} 

y belongs to the empty set

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