-12=2k-k-9

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Solution for -12=2k-k-9 equation: 


k in (-oo:+oo)

-12 = 2*k-k-9 // - 2*k-k-9

k-(2*k)-12+9 = 0

k-2*k-12+9 = 0

-k-3 = 0 // + 3

-k = 3 // * -1

k = -3

k = -3

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