OG PS 205题目

christina201008

答案是E，求解

WilliamT

The amount Mary has in the end is x-y dollars and she worked for 8 hours;
The amount John has in the end is x+y dollars and he worked for 10 hours;;

We are told that in this case their hourly wage was the same: ,hourly wage formula=wage/(#of hours worked)
(x-y)/8=(x+y)/10


from (x−y)/8=(x+y)/10 we get that x=9y.

Answer: E.

christina201008

WilliamT 发表于 2015-12-23 23:34
The amount Mary has in the end is x-y dollars and she worked for 8 hours;
The amount John has in the ...

thank you very much