Answer:
76
Explanation:
Sam bought six new baseball trading cards to add to his collection. The next day his dog ate half of his collection. There are now only thirty eight cards left. Therefore, he started out with 76 baseball trading cards.
Dog ate half of his collection (not including the 6 new baseball cards)
38 are left.
38x2=76
38x2=76
Therefore, he started out with 76 baseball cards.