Answer:
2(5) -2(3) = 4
Explanation:
Fill the 5-liter container, pour out 3 liters into the 3-liter container.
Empty the 3-liter container and pour the remaining 2 liters from the 5-liter container into the 3-liter container.
Refill the 5-liter container and use it to fill the remaining liter in the 3-liter container.
The 5-liter container will have 4 liters in it.