8/30=28/n

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Solution for 8/30=28/n equation: 


D( n )

n = 0

n = 0

n = 0

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

8/30 = 28/n // - 28/n

8/30-(28/n) = 0

8/30-28*n^-1 = 0

-28*n^-1 = -4/15 // : -28

n^-1 = 1/105

-1 < 0

1/(n^1) = 1/105 // * n^1

1 = 1/105*n^1 // : 1/105

105 = n^1

n = 105

n = 105

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