To simplify the expression \((h+k) - (2k - h)\), we can use the properties of operations, specifically the distributive property and combining like terms.
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Start with the given expression: \[ (h + k) - (2k - h) \]
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Distribute the negative sign across the second parentheses: \[ h + k - 2k + h \]
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Combine like terms:
- The \(h\) terms: \(h + h = 2h\)
- The \(k\) terms: \(k - 2k = -k\)
Putting it all together, we get: \[ 2h - k \]
So the final simplified expression is: \[ \boxed{2h - k} \]