9/7=5/k

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Solution for 9/7=5/k equation: 


D( k )

k = 0

k = 0

k = 0

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

9/7 = 5/k // - 5/k

9/7-(5/k) = 0

9/7-5*k^-1 = 0

-5*k^-1 = -9/7 // : -5

k^-1 = 9/35

-1 < 0

1/(k^1) = 9/35 // * k^1

1 = 9/35*k^1 // : 9/35

35/9 = k^1

k = 35/9

k = 35/9

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