-105/35=21/n

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Solution for -105/35=21/n equation: 


D( n )

n = 0

n = 0

n = 0

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

-105/35 = 21/n // - 21/n

-(21/n)-105/35 = 0

-21*n^-1-105/35 = 0

-21*n^-1 = 3 // : -21

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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