27=7k+7k-1

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Solution for 27=7k+7k-1 equation: 


k in (-oo:+oo)

27 = 7*k+7*k-1 // - 7*k+7*k-1

1-(7*k)-(7*k)+27 = 0

1-7*k-7*k+27 = 0

28-14*k = 0 // - 28

-14*k = -28 // : -14

k = -28/(-14)

k = 2

k = 2

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