4 + 9 + 3 =
5 + 6 + ____ = 15
2 + 10 + 7 =
13 + ____ + 1 = 19
8 + 2 + 10 =
_____ + 3 + 4 = 15
12 + 4 + 4 =
Misha, Sasha, and Kesha decided to go searching for some apples in the orchard. Misha found 7 apples lying on the ground, Sasha found 8 apples lying on the ground, and Kesha found 2 apples lying on the ground. How many apples did they find altogether? (include equation in your answer)