Answer:
6 Days
Step-by-step example:
You start with 46 and then subtract 7 a day, and your friend starts with 22 and subtract 3 a day.
Day 1 You: 46-7=39
Day 1 Your friend: 22-3=19
Day two you: 39-7=32
Day 2 your friend: 19-3=16
Day 3 You= 32-7=25
Day 3 your friend:16-3=13
Day 4 you: 25-7=18
Day 4 your friend= 13-3=10
Day 5 you= 18-7=11
Day 5 your friend= 10-3=7
Day 6 you: 11-7=4
Day 6 your friend: 7-3=4