20/5/4=8/n

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Solution for 20/5/4=8/n equation: 


D( n )

n = 0

n = 0

n = 0

n in (-oo:0) U (0:+oo)

(20/5)/4 = 8/n // - 8/n

(20/5)/4-(8/n) = 0

(20/5)/4-8*n^-1 = 0

-8*n^-1 = -1 // : -8

n^-1 = 1/8

-1 < 0

1/(n^1) = 1/8 // * n^1

1 = 1/8*n^1 // : 1/8

8 = n^1

n = 8

n = 8

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