Question
PSLE
The mass of a box with 47 identical marbles is 720 g. When 18 of the marbles are thrown away, the mass of the box with the remaining marbles is 486 g. What is the mass of each marble?
2 m

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PSLE
The mass of a box with 47 identical marbles is 720 g. When 18 of the marbles are thrown away, the mass of the box with the remaining marbles is 486 g. What is the mass of each marble?