Q26: Running at their respective constant rates, machine X takes 2 days longer to produce w widgets than machine Y.At these rates, if the two machines together produce 5/4 w widgets in 3 days, how many days would it take machine X alone to produce 2w widgets?
A.4 B.6 C.8 D.10 E.12 Answer: E 请问这一题的思路是怎样的?谢谢! ^^