21/15=14/k

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Solution for 21/15=14/k equation: 


D( k )

k = 0

k = 0

k = 0

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

21/15 = 14/k // - 14/k

21/15-(14/k) = 0

21/15-14*k^-1 = 0

-14*k^-1 = -7/5 // : -14

k^-1 = 1/10

-1 < 0

1/(k^1) = 1/10 // * k^1

1 = 1/10*k^1 // : 1/10

10 = k^1

k = 10

k = 10

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