Question
A bag contains blue and brown balls in the ratio of 2 : 5. There is a total of 63 balls in the bag. How many more blue balls must be added into the bag so that the number of blue balls will be the same as the number of brown balls?
2 m

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A bag contains blue and brown balls in the ratio of 2 : 5. There is a total of 63 balls in the bag. How many more blue balls must be added into the bag so that the number of blue balls will be the same as the number of brown balls?