Alicia had a wonderful birthday party where she got lots of presents. 10 of the presents were in small boxes. 12 of the presents were in medium boxes. A third of all the presents she is given are in large boxes. How many presents did Alicia get for her birthday?
Alicia got 10 small boxed presents + 12 medium boxed presents = 22 presents.
A third of all the presents Alicia gets are in large boxes, 22 / 2 = 11 is half of the presents we know Alicia got.
11 x 3 = 33 presents Alicia got on her birthday.