subttact 2 (k-4)-3(2k-1)

To simplify the expression:

2(k-4) - 3(2k-1)

First, distribute the 2 and the 3:
2k - 8 - 6k + 3

Combine like terms:
(2k - 6k) + (-8 + 3)
-4k - 5

The simplified expression is -4k - 5.