To find out how many marbles Dalia had in total, we need to calculate the number of marbles Jake lost.
Given that Jake lost two marbles and currently has seven marbles, we can determine the number of marbles Dalia had by adding the number of marbles Jake has to the number of marbles he lost.
Let's calculate:
Total marbles Jake has = 7
Marbles Jake lost = 2
Total marbles Dalia had = Total marbles Jake has + Marbles Jake lost
Total marbles Dalia had = 7 + 2 = 9
Therefore, Dalia had a total of 9 marbles.