To simplify the expression \( 2(k−4)−3(2k−1) \), we'll follow these steps:
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Distribute the constants into the parentheses: \[ 2(k - 4) = 2k - 8 \] \[ -3(2k - 1) = -6k + 3 \]
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Now combine these results: \[ 2k - 8 - 6k + 3 \]
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Combine like terms: \[ (2k - 6k) + (-8 + 3) = -4k - 5 \]
Therefore, the result of the subtraction \( 2(k−4)−3(2k−1) \) is: \[ \boxed{-4k - 5} \]