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Are you looking for answers or worked solutions to this question from Maris Stella SA 2 paper 2 question 8?

Maris Stella SA 2 paper 2 question 8

Box A contains only 50 cent coins while Box B contains only 20 cent coins. There are 19 more coins in Box B than in Box A. The amount of money in Box A and Box B is $15. How many 50 cent coins can all the 20cent coins in the Box B changed into?

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