Answers:
a. diagram b
b. 10.4 - 2.6 = x
c. x = 7.8
d. the solution to the equation is the amount of water (in liters) that was originally in the pitcher.
Explanation:
a. the answer is diagram b because the pitcher "then" contained 10.4 liters, meaning the 2.6 liters added contributed to the total of 10.4 liters.
b. this was derived from the diagram.
c. 10.4 - 2.6 = 7.8, so x = 7.8
i hope this helps! :D