Question
PSLE
The mass of a container with 70 identical marbles is 807 g. When 20 of the marbles are used, the mass of the container with the remaining marbles is 527 g. What is the mass of each marble?
2 m

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PSLE
The mass of a container with 70 identical marbles is 807 g. When 20 of the marbles are used, the mass of the container with the remaining marbles is 527 g. What is the mass of each marble?