A basketball team played 40 games and won 70% of the games. It still had 10 games to play. How many games can they lose to win 60% of their games? Let's think first. Chain of thought:
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The team has won 40 x 70 / 100 = 28 games out of 40. There a total of 40 + 10 = 50 games to be played. The team has to win a total of is 50 x 60 / 100 = 30 games. So, it still needs to win 30 - 28 = 2 more games. Hence, they can still lose 10 - 2 = 8 games.
Therefore, the answer is 8.
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