Question
The mass of Box W is 135 kg. The mass of Box Y is 23 kg more than the mass of Box W. The mass of Box X is 57 kg less than the mass of Box Y. What is the mass of Box X?
4 m

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The mass of Box W is 135 kg. The mass of Box Y is 23 kg more than the mass of Box W. The mass of Box X is 57 kg less than the mass of Box Y. What is the mass of Box X?