A total of 28 teams participated in the square dance competition in a certain district, of which the first prize accounted for a quarter or the second prize of the total number of participants.

Suppose there are x participants in the extra competition, the number of people who won the first prize is112x, and the number of people who won the second prize is.

1/9 x people, according to the meaning of the question.

1/ 12x+ 1/9x = 35

The solution is x= 180.

A: * * * There were 180 participants.