Robie filled some plastic boxes with hockey cards. There were 10 cards in each box but 5 cards were not placed in a box. He gave away 2 boxes to his friends and he has 5 boxes with him. How many cards did Robie have in the beginning? Let's be accurate as possible.
Robie filled a total of 2 + 5 = 7 boxes. So, he had 7 x 10 = 70 hockey cards from the 7 boxes. Thus, he had a total of 70 + 5 = 75 cards in the beginning.
The answer: 75.