-42/21=6/n

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Solution for -42/21=6/n equation: 


D( n )

n = 0

n = 0

n = 0

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

-42/21 = 6/n // - 6/n

-(6/n)-42/21 = 0

-6*n^-1-42/21 = 0

-6*n^-1 = 2 // : -6

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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