-42/21=14/n

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Solution for -42/21=14/n equation: 


D( n )

n = 0

n = 0

n = 0

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

-42/21 = 14/n // - 14/n

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

-14*n^-1-42/21 = 0

-14*n^-1 = 2 // : -14

n^-1 = -1/7

-1 < 0

1/(n^1) = -1/7 // * n^1

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

-7 = n^1

n = -7

n = -7

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