(7k-1/3k)(1/1-7k)

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Solution for (7k-1/3k)(1/1-7k) equation: 


k in (-oo:+oo)

(7*k-((1/3)*k))*(1/1-(7*k)) = 0

(7*k+(-1/3)*k)*(1-7*k) = 0

20/3*k*(1-7*k) = 0

( 1-7*k )

1-7*k = 0 // - 1

-7*k = -1 // : -7

k = -1/(-7)

k = 1/7

( 20/3*k )

20/3*k = 0 // : 20/3

k = 0

k in { 1/7, 0 }

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