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

Click button first when a symbol is required. X

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