5/7=20/n-2

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Solution for 5/7=20/n-2 equation: 


D( n )

n = 0

n = 0

n = 0

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

5/7 = 20/n-2 // - 20/n-2

5/7-(20/n)+2 = 0

5/7-20*n^-1+2 = 0

-20*n^-1 = -19/7 // : -20

n^-1 = 19/140

-1 < 0

1/(n^1) = 19/140 // * n^1

1 = 19/140*n^1 // : 19/140

140/19 = n^1

n = 140/19

n = 140/19

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