Question
Olivia bought 8 packs of cards. There were 40 cards in each pack. After she had given 105 cards to Shiyun, 30 to Glen and some to Valen, she had 38 of the cards left. How many cards did she give to Valen?
4 m

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Olivia bought 8 packs of cards. There were 40 cards in each pack. After she had given 105 cards to Shiyun, 30 to Glen and some to Valen, she had 38 of the cards left. How many cards did she give to Valen?