Answer:
1/2
Step-by-step explanation:
There are 7 beakers that each contain liter.
There are 3 beakers that each contain liter.
Multiply each amount of liquid by the number of beakers containing that amount.
Now, add the amounts to find the total amount of liquid in all the beakers.
Last, subtract the total amount of liquid from the amount that the container can hold, 4 liters.
So, after pouring all of the liquid into an empty container that can hold exactly 4 liters, the container can hold 1/2 liter more liquid.