8/40=5/n

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Solution for 8/40=5/n equation: 


D( n )

n = 0

n = 0

n = 0

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

8/40 = 5/n // - 5/n

8/40-(5/n) = 0

8/40-5*n^-1 = 0

-5*n^-1 = -1/5 // : -5

n^-1 = 1/25

-1 < 0

1/(n^1) = 1/25 // * n^1

1 = 1/25*n^1 // : 1/25

25 = n^1

n = 25

n = 25

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