7=9-18/k

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Solution for 7=9-18/k equation: 


D( k )

k = 0

k = 0

k = 0

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

7 = 9-(18/k) // - 9-(18/k)

18/k-9+7 = 0

18*k^-1 = 2 // : 18

k^-1 = 1/9

-1 < 0

1/(k^1) = 1/9 // * k^1

1 = 1/9*k^1 // : 1/9

9 = k^1

k = 9

k = 9

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