In Rodrigo's classroom in the morning there are red chairs, yellow chairs, and blue chairs. There are 4 red chairs. There are 2 times as many yellow chairs as red chairs, and there are 2 fewer blue chairs than yellow chairs. In the afternoon, Lisa borrows 3 chairs. How many chairs are left in Rodrigo's classroom? Let's answer step by step:
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There are 2 * 4 red chairs = 8 yellow chairs. There are 8 yellow chairs - 2 = 6 blue chairs. Total in the morning there were 4 red + 8 yellow + 6 blue = 18 chairs. After Lisa removed chairs there were 18 - 3 chairs = 15 chairs remaining. The answer: 15.
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