8/20=12/n

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Solution for 8/20=12/n equation: 


D( n )

n = 0

n = 0

n = 0

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

8/20 = 12/n // - 12/n

8/20-(12/n) = 0

8/20-12*n^-1 = 0

-12*n^-1 = -2/5 // : -12

n^-1 = 1/30

-1 < 0

1/(n^1) = 1/30 // * n^1

1 = 1/30*n^1 // : 1/30

30 = n^1

n = 30

n = 30

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