4x+y=t
3/4z+3/4z+3/4z+1/2z=Milk Jug Quantity= 2.75 Cups
1/4c+1/4c+1/4c+1/2c+1=Total coffee drunk=2.25 Cups
Since more milk has been drunk, and one of the jugs in empty, considering the fact that the coffee jug has 4 more times more liquid, it is implied that the milk jug is complete. And we know the amount of milk in the jug is 2.25, multiplying this by 4, we get 9, 9 cups. That is the total quantity of coffee. Subracting 2.25 from 9 is equal to 6.75 cups which is the amount of coffee left in the coffee jug.
