The number of girls in the first team is equal to the number of boys in the second team, so the total number of boys in the first team plus boys in the second team is just equal to the number of boys in the first team, which is 3/5 of the total number of boys. Because the number of boys in each team is equal, the number of boys in the third team is 2/5 of the total number of boys, and four girls are equal to the total number of boys in the first team, which is 3/5 of the total number of boys, so 65438+ 0/5 of the total number of boys is equal to 4, that is.