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If Alan gives Brenda $ 5. 50 they will both h
问题详情
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？请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：Alan：$26．50 Brenda：$15．50
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)
