6/12=21/n

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Solution for 6/12=21/n equation: 


D( n )

n = 0

n = 0

n = 0

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

6/12 = 21/n // - 21/n

6/12-(21/n) = 0

6/12-21*n^-1 = 0

-21*n^-1 = -1/2 // : -21

n^-1 = 1/42

-1 < 0

1/(n^1) = 1/42 // * n^1

1 = 1/42*n^1 // : 1/42

42 = n^1

n = 42

n = 42

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