K/2-1=2 - solution

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Solution for K/2-1=2 equation:

K in (-oo:+oo)

K/2-1 = 2 // - 2

K/2-2-1 = 0

1/2*K-3 = 0 // + 3

1/2*K = 3 // : 1/2

K = 3/1/2

K = 6

K = 6

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