Question
A bag contains green and silver marbles in the ratio of 3 : 7. There is a total of 140 marbles in the bag. How many more green marbles must be added into the bag so that the number of green marbles will be the same as the number of silver marbles?
2 m

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A bag contains green and silver marbles in the ratio of 3 : 7. There is a total of 140 marbles in the bag. How many more green marbles must be added into the bag so that the number of green marbles will be the same as the number of silver marbles?