Question
Cathy has a mass of 60 kg. Shannon weighs 20 kg more than Cathy but 7 kg less than Opal. Find the total mass of the 3 girls.
4 m

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Cathy has a mass of 60 kg. Shannon weighs 20 kg more than Cathy but 7 kg less than Opal. Find the total mass of the 3 girls.