Mathematics
During his busiest week as an origami artist, Nate made 20 origami figures per hour on weekdays and 30 per hour on the weekend. During this particular week, Nate made a total of 650 origami figures by working 5 times as many hours on weekdays as he did on the weekend. If he worked x hours on the weekdays and y hours on the weekend, how many total hours did he work during this week?
A.5
B.20
C.25
D.30
解析：