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?
Step-by-step reasoning:
20
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.

.

The answer is 20