Final answer:
Dustin collected 22 poke balls from the poke stops, calculated by subtracting his initial 11 poke balls from the total of 33 he ended up with.
Step-by-step explanation:
The question is asking how many poke balls Dustin was able to collect at the poke stops.
Dustin originally had 11 poke balls and after visiting a few stops, he had 33.
To find out how many poke balls Dustin collected, we subtract the number of poke balls he had initially from the total number he ended up with after visiting the poke stops.
The calculation would be 33 poke balls (total after) - 11 poke balls (initial) = 22 poke balls collected.
Therefore, Dustin collected 22 poke balls at the poke stops.