Problem description:

Team A and Team B play a football match, and it is stipulated that each team will get 3 points for winning a game, 1 point for drawing a game, and 0 point for losing a game. If Team A wins twice as many games as the draw, the draw is one more game than the lost game, and the score of * * * is 2 1, Then team A won _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Analysis:

Team A and Team B play a football match, and it is stipulated that each team will get 3 points for winning a game, 1 point for drawing a game, and 0 point for losing a game. If Team A wins twice as many games as the draw, and the draw is one more game than the negative game, and the score of * * * is 2 1, then Team A wins _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

If X games are tied, it will win 2X games and lose X- 1.

X+2X*3=2 1

X=3