9/15=12/k

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Solution for 9/15=12/k equation: 


D( k )

k = 0

k = 0

k = 0

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

9/15 = 12/k // - 12/k

9/15-(12/k) = 0

9/15-12*k^-1 = 0

-12*k^-1 = -3/5 // : -12

k^-1 = 1/20

-1 < 0

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

1 = 1/20*k^1 // : 1/20

20 = k^1

k = 20

k = 20

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