7/5=28/n

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Solution for 7/5=28/n equation: 


D( n )

n = 0

n = 0

n = 0

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

7/5 = 28/n // - 28/n

7/5-(28/n) = 0

7/5-28*n^-1 = 0

-28*n^-1 = -7/5 // : -28

n^-1 = 1/20

-1 < 0

1/(n^1) = 1/20 // * n^1

1 = 1/20*n^1 // : 1/20

20 = n^1

n = 20

n = 20

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