conversations.from: human
conversations.value: Frankie and Carla played 30 games of ping pong against each other.  Frankie won half as many games as did Carla.  How many games did Carla win?
  Can you solve this problem?
conversations.from: assistant
conversations.value: Let x be the number of games that Frankie won.
  Then the number of games Carla won would be 2*x.
  And the sum of all the games would be x+2*x=30 games.
  Thus, the expression simplifies to 3*x=30.
  And the value of x=10 games.
  Therefore, the number of Carla's wins would be 2x=20 games.