Answer:


Explanation:
Let x represent the number of days. and y be the total cost.
We have been given that day and night kennel charges $20 per day, so charges for x days will be 20x.
We are also told that they charge food fee of $15 to board a pet, so total cost of boarding a pet in day and night kennel would be

The home away from home kennel charges $30 per day, so charges for x days will be 30x.
We are also told that they charge food fee of $5 to board a pet, so total cost of boarding a pet in day and night kennel would be

Therefore, our required system would be:

