2. 职称英语
  3. If Alan gives Brenda $ 5. 50, they will both have the same amount of money. If B

If Alan gives Brenda $ 5. 50, they will both have the same amount of money. If B

游客2023-10-15  48
问题 If Alan gives Brenda $ 5. 50, they will both have the same amount of money. If Brenda gives Alan $ 1. 50, Alan will have twice as much as Brenda. What did they have at the start?
选项
答案 Alan：$26．50 Brenda：$15．50
解析 (假设Alan最初有x美元，Brenda最初有Y美元，可得方程组①x一5．50=Y+5．50②2(x—1．5)=Y+1．5。方程可解，x=26．50，Y=15．50)
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