Two crocodile owners (owner i and owner ii) were talking and, during the conversation, they realised a weird coincidence. if owner i sold 7 of his crocodile to owner ii, owner i would have the same amount of crocodiles as owner ii. on the other side, if owner ii sold 7 of his crocodiles to owner i, owner i would have exactly the double of crocodiles of owner ii. how many crocodiles each of them have?