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:
[tex]x\text{ }\leq\text{ 180}[/tex]Compact cars may pack in any space implies :
[tex]x\text{ + y }\leq\text{ 400}[/tex]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)
