To subtract (h+k)-(2k-h), we need to distribute the subtraction sign to both terms inside the parentheses.
(h+k) - (2k-h) can be rewritten as h + k - 2k + h.
Next, we can rearrange the terms by grouping like terms together.
(h + h) + (k - 2k) can be simplified to 2h - k.
Therefore, (h+k)-(2k-h) is equal to 2h - k.