28/12=7/n

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Solution for 28/12=7/n equation: 


D( n )

n = 0

n = 0

n = 0

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

28/12 = 7/n // - 7/n

28/12-(7/n) = 0

28/12-7*n^-1 = 0

-7*n^-1 = -7/3 // : -7

n^-1 = 1/3

-1 < 0

1/(n^1) = 1/3 // * n^1

1 = 1/3*n^1 // : 1/3

3 = n^1

n = 3

n = 3

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