8/5=7/K

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Solution for 8/5=7/K equation: 


D( K )

K = 0

K = 0

K = 0

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

8/5 = 7/K // - 7/K

8/5-(7/K) = 0

8/5-7*K^-1 = 0

-7*K^-1 = -8/5 // : -7

K^-1 = 8/35

-1 < 0

1/(K^1) = 8/35 // * K^1

1 = 8/35*K^1 // : 8/35

35/8 = K^1

K = 35/8

K = 35/8

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