(4-n)/(2n-8)

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Solution for (4-n)/(2n-8) equation: 


D( n )

2*n-8 = 0

2*n-8 = 0

2*n-8 = 0

2*n-8 = 0 // + 8

2*n = 8 // : 2

n = 8/2

n = 4

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

(4-n)/(2*n-8) = 0

4-n = 0 // - 4

-n = -4 // * -1

n = 4

n in { 4} 

n belongs to the empty set

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