Mathematics, 18.03.2020 17:57, Nov25

Justine swims freestyle at a pace of 150 laps per hour. Justine swims breaststroke 20 laps per hour slower than she swims butterfly. If Justin freestyles speed is three times faster than her butterfly speed in laps per hour and r represents Justin's breaststroke speed in laps per hour.

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Justine swims freestyle at a pace of 150 laps per hour. Justine swims breaststroke 20 laps per hour...