Answer:
Explanation:
Let's call the original volume of water in the pitcher "V". Then, after Mai added 2.6 liters, the total volume of water in the pitcher became V + 2.6 = 10.4 liters.
To find the original volume of water in the pitcher, we can isolate V by subtracting 2.6 from both sides of the equation:
V + 2.6 = 10.4
V = 10.4 - 2.6
V = 7.8 liters
So the original volume of water in the pitcher was 7.8 liters.