Question
Xavier has $8 in his savings box and Riordan has $2 in his. Xavier adds $1 to his savings box each day and Riordan adds $4 to his each day. On which day will Riordan’s savings be twice of Xavier’s?
4 m

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Xavier has $8 in his savings box and Riordan has $2 in his. Xavier adds $1 to his savings box each day and Riordan adds $4 to his each day. On which day will Riordan’s savings be twice of Xavier’s?