To solve the equation \( 20h + 40 = 480 \), follow these steps:
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Subtract 40 from both sides of the equation: \[ 20h = 480 - 40 \] \[ 20h = 440 \]
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Now, divide both sides by 20: \[ h = \frac{440}{20} \] \[ h = 22 \]
So, the solution is \( h = 22 \).