Question
The mass of Box X is 137 kg. The mass of Box Z is 23 kg more than the mass of Box X. The mass of Box Y is 60 kg less than the mass of Box Z. What is the mass of Box Y?
4 m

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The mass of Box X is 137 kg. The mass of Box Z is 23 kg more than the mass of Box X. The mass of Box Y is 60 kg less than the mass of Box Z. What is the mass of Box Y?