Tell me the answer and tell me how to work it out

Well I believe the answer is A. instead of B,C, or D,

This is because you would not need to multiply right away. The problem addresses that John buys 5 more which means to add and if you needed to multiply right away it would have said twice as much or greater to for an increasive value.

Solution: 2×45+5=f

The answer would be F. (2 x 45 + 5 = f). Josh had 2 times more cards than Mark (45 x 2). then Josh bought 5 more (+5).

Haidbysksusnsjshusjh