58. The ratio of the number of people from Yushui Community and Lvyin Community participating in Olympic volunteer services is $5: 4$, among which Yushui Community has 10 people participating in Olympic venue volunteer services, and Lvyin Community has 5 people participating in Olympic venue volunteer services, the remaining number of volunteers from both communities is equal, then the total number of people from Yushui Community and Lvyin Community participating in Olympic volunteer services. $\qquad$
Reference answer: 45