7/n=21/3

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Solution for 7/n=21/3 equation: 


D( n )

n = 0

n = 0

n = 0

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

7/n = 21/3 // - 21/3

7/n-(21/3) = 0

7/n-7 = 0

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

n^-1 = 1

-1 < 0

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

1 = 1*n^1 // : 1

1 = n^1

n = 1

n = 1

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