Question
A bag contains purple and pink beads in the ratio of 2 : 7. There is a total of 81 beads in the bag. How many more purple beads must be added into the bag so that the number of purple beads will be the same as the number of pink beads?
2 m

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A bag contains purple and pink beads in the ratio of 2 : 7. There is a total of 81 beads in the bag. How many more purple beads must be added into the bag so that the number of purple beads will be the same as the number of pink beads?