12/18=15/k

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Solution for 12/18=15/k equation: 


D( k )

k = 0

k = 0

k = 0

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

12/18 = 15/k // - 15/k

12/18-(15/k) = 0

12/18-15*k^-1 = 0

-15*k^-1 = -2/3 // : -15

k^-1 = 2/45

-1 < 0

1/(k^1) = 2/45 // * k^1

1 = 2/45*k^1 // : 2/45

45/2 = k^1

k = 45/2

k = 45/2

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