2/7=5/n

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Solution for 2/7=5/n equation: 


D( n )

n = 0

n = 0

n = 0

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

2/7 = 5/n // - 5/n

2/7-(5/n) = 0

2/7-5*n^-1 = 0

-5*n^-1 = -2/7 // : -5

n^-1 = 2/35

-1 < 0

1/(n^1) = 2/35 // * n^1

1 = 2/35*n^1 // : 2/35

35/2 = n^1

n = 35/2

n = 35/2

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