Inequality word problems: the greatest whole number that fits

Write an inequality for the situation, solve it, then round to a whole number in the direction that makes it true.

1. A lift can carry at most 45 kg. It already carries 7 kg of luggage. Each box weighs 5 kg. What is the greatest number of boxes that can be added?
2. A lift can carry at most 22 kg. It already carries 6 kg of luggage. Each box weighs 4 kg. What is the greatest number of boxes that can be added?
3. A lift can carry at most 33 kg. It already carries 8 kg of luggage. Each box weighs 7 kg. What is the greatest number of boxes that can be added?
4. A lift can carry at most 28 kg. It already carries 8 kg of luggage. Each box weighs 4 kg. What is the greatest number of boxes that can be added?
5. A lift can carry at most 29 kg. It already carries 15 kg of luggage. Each box weighs 3 kg. What is the greatest number of boxes that can be added?
6. A lift can carry at most 43 kg. It already carries 8 kg of luggage. Each box weighs 3 kg. What is the greatest number of boxes that can be added?
7. A lift can carry at most 27 kg. It already carries 10 kg of luggage. Each box weighs 4 kg. What is the greatest number of boxes that can be added?
8. A lift can carry at most 82 kg. It already carries 11 kg of luggage. Each box weighs 6 kg. What is the greatest number of boxes that can be added?
9. A lift can carry at most 51 kg. It already carries 11 kg of luggage. Each box weighs 4 kg. What is the greatest number of boxes that can be added?
10. A lift can carry at most 54 kg. It already carries 10 kg of luggage. Each box weighs 5 kg. What is the greatest number of boxes that can be added?
11. A lift can carry at most 55 kg. It already carries 11 kg of luggage. Each box weighs 8 kg. What is the greatest number of boxes that can be added?
12. A lift can carry at most 38 kg. It already carries 18 kg of luggage. Each box weighs 5 kg. What is the greatest number of boxes that can be added?
13. A lift can carry at most 46 kg. It already carries 4 kg of luggage. Each box weighs 4 kg. What is the greatest number of boxes that can be added?
14. A lift can carry at most 21 kg. It already carries 14 kg of luggage. Each box weighs 2 kg. What is the greatest number of boxes that can be added?
15. A lift can carry at most 161 kg. It already carries 22 kg of luggage. Each box weighs 12 kg. What is the greatest number of boxes that can be added?
16. A lift can carry at most 65 kg. It already carries 8 kg of luggage. Each box weighs 7 kg. What is the greatest number of boxes that can be added?
17. A lift can carry at most 189 kg. It already carries 21 kg of luggage. Each box weighs 14 kg. What is the greatest number of boxes that can be added?
18. A lift can carry at most 55 kg. It already carries 25 kg of luggage. Each box weighs 3 kg. What is the greatest number of boxes that can be added?
19. A lift can carry at most 98 kg. It already carries 19 kg of luggage. Each box weighs 8 kg. What is the greatest number of boxes that can be added?
20. A lift can carry at most 87 kg. It already carries 35 kg of luggage. Each box weighs 11 kg. What is the greatest number of boxes that can be added?