We represent
x as the number of regular cars and,
y as the number of compact cars
Number of regular spaces = 180
Number of compact spaces = 400 - 180 = 220
Regular cars must pack in regular spaces implies:
![x\text{ }\leq\text{ 180}](https://img.qammunity.org/2023/formulas/mathematics/college/ikuybextykc5er61pog47dyamjcs7nht2m.png)
Compact cars may pack in any space implies :
![x\text{ + y }\leq\text{ 400}](https://img.qammunity.org/2023/formulas/mathematics/college/c86s689se99jcrn9i8mb3bkx9drkv0bvb1.png)
Meaning the sum of cars packed in the regular space plus that in the compact space cannot be more than the total number of spaces(400)