A basketball game adopts a home-and-away round-robin match, that is, every two teams have to play two games: one at the location of their own team and one at the location of the opposing team; it is known that there will be a total of 90 games, how many basketball teams are there? contest?
某篮球赛实行主客场制循环赛，即每两支队伍都要比赛两场：在自己球队所在地，和对方球队所在地各赛一场；已知一共要进行90场比赛，有多少支篮球队参赛？
<result>10</result>