-105/21=15/n

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Solution for -105/21=15/n equation: 


D( n )

n = 0

n = 0

n = 0

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

-105/21 = 15/n // - 15/n

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

-15*n^-1-105/21 = 0

-15*n^-1 = 5 // : -15

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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