Mathematics, 30.03.2021 20:40, kailahgranger

Alex can shovel the driveway in 45 minutes if he works alone. Alex and Luisa can shovel the driveway in 20 minutes if they work together. According to this equation, Luisa can shovel the driveway in minutes if she works alone,
How many minutes would it take Luisa to shovel the driveway if she works alone?

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Alex can shovel the driveway in 45 minutes if he works alone. Alex and Luisa can shovel the driveway...