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Evaluate the expression for g = 4 and h = 7.

gh − h =

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To evaluate the expression \( gh - h \) for \( g = 4 \) and \( h = 7 \), we follow these steps:

  1. Substitute the values of \( g \) and \( h \) into the expression: \[ gh - h = 4 \cdot 7 - 7 \]

  2. Calculate \( 4 \cdot 7 \): \[ 4 \cdot 7 = 28 \]

  3. Now substitute back into the expression: \[ 28 - 7 \]

  4. Finally, perform the subtraction: \[ 28 - 7 = 21 \]

So, the value of the expression \( gh - h \) is \(\boxed{21}\).