Number of matches between all x individuals: x (x-1)/2 > 84== >x & gt= 14

Number of matches between players after removing two players: (x-2) (x-3)/2.

So 14 =

When x = x= 14, * * cycles 9 1 field, and 12 people compete for 66 games, then the two-player ratio of 6 games is removed, and ***72 games.

When x = 15, there are 78 games between * * cycle 105 and 13, and then 6 games between two people are removed, and ***84 games.

So there are 15 people.