Question
Gwen had thrice as many cards as erasers at first. She removed 7 cards and 3 erasers each time. In the end, there were 17 cards and 1 eraser left. How many cards and erasers did Gwen have at first?
4 m

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Gwen had thrice as many cards as erasers at first. She removed 7 cards and 3 erasers each time. In the end, there were 17 cards and 1 eraser left. How many cards and erasers did Gwen have at first?