Question
A bag contains silver and blue balls in the ratio of 2 : 7. There is a total of 99 balls in the bag. How many more silver balls must be added into the bag so that the number of silver balls will be the same as the number of blue balls?
2 m

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A bag contains silver and blue balls in the ratio of 2 : 7. There is a total of 99 balls in the bag. How many more silver balls must be added into the bag so that the number of silver balls will be the same as the number of blue balls?