To solve for \( s \) in the equation \( 4 + (-8 + s) = 20 \), we can simplify the expression step-by-step.
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Rewrite the equation: \[ 4 - 8 + s = 20 \]
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Combine the constants \( 4 \) and \( -8 \): \[ -4 + s = 20 \]
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Add \( 4 \) to both sides to isolate \( s \): \[ s = 20 + 4 \]
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Simplify: \[ s = 24 \]
Thus, the solution is: \[ s = 24 \]