Question
PSLE
The mass of a box with 42 identical marbles is 763 g. When 12 of the marbles are used, the mass of the box with the remaining marbles is 547 g. What is the mass of each marble?
2 m

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PSLE
The mass of a box with 42 identical marbles is 763 g. When 12 of the marbles are used, the mass of the box with the remaining marbles is 547 g. What is the mass of each marble?