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 a

admin2016-03-17  38

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)
转载请注明原文地址:https://kaotiyun.com/show/MaAK777K
0

最新回复(0)