To subtract the expression \(2(k-4) - 3(2k-1)\), we can first distribute the constants in front of the parentheses.
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Distribute \(2\) in \(2(k-4)\): \[ 2(k-4) = 2k - 8 \]
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Distribute \(-3\) in \(-3(2k-1)\): \[ -3(2k-1) = -6k + 3 \]
Now, combine the two results: \[ 2(k-4) - 3(2k-1) = (2k - 8) + (-6k + 3) \]
Next, we can combine like terms: \[ = 2k - 6k - 8 + 3 \] \[ = -4k - 5 \]
Thus, the result of the expression \(2(k-4) - 3(2k-1)\) is: \[ \boxed{-4k - 5} \]