To maintain a ratio of 2 teaspoons of liquid soap to 3 gallons of water, AJ, with 3 tablespoons of liquid soap, needs 13.5 gallons of water. This is calculated by converting tablespoons to teaspoons and applying the given ratio.
If AJ uses a ratio of 2 teaspoons of liquid soap for every 3 gallons of water, and he has 3 tablespoons of liquid soap, we need to convert tablespoons to teaspoons since 1 tablespoon is equivalent to 3 teaspoons.
Now, using the given ratio, for every 2 teaspoons of liquid soap, AJ needs 3 gallons of water. Therefore, for 9 teaspoons of liquid soap:
AJ should use 13.5 gallons of water to mix with 3 tablespoons of liquid soap.