Question
Joshua put 521 stamps in three boxes A, B and C. Box A and Box B contained a total of 257 stamps. Box B and Box C contained a total of 386 stamps. How many stamps were there in Box A and Box C altogether?


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Joshua put 521 stamps in three boxes A, B and C. Box A and Box B contained a total of 257 stamps. Box B and Box C contained a total of 386 stamps. How many stamps were there in Box A and Box C altogether?