A backpacking company requires each camper to bring a flashlight to go on a trip. The company supplies 4 extra in case any flashlights get lost or broken.

Let c represent the number of campers and f represent the total number of flashlights.

$$f=c+\Delta$$

(a)  

Each box of candies has 4 fewer truffles than caramels.

Let c represent the number of caramels in a box and t represent the number of truffles in the same box.

$$t=c-\Delta$$

(a)  

At Jenny's restaurant and bakery, each cake is cut into 9 pieces.

Let c represent the number of cakes and p represent the total pieces of cake.

$$p=\Delta\times c$$

(a)  

A boy and a girl are playing a game where each of them tries to guess the number of a facedown card. The girl's strategy is to always guess a number that is 3 fewer than the boy's guess.

Let b represent the boy's guess and g represent the girl's guess.

$$g=b-\Delta$$

(a)  

Every day, an automobile factory assembles 9 more cars than trucks.

Let t represent the number of trucks assembled and c represent the number of cars assembled.

$$c=t+\Delta$$

(a)  

To play in Austen's basketball league, a team must have exactly 8 players.

Let t represent the number of teams in the league and p represent the total number of players.

$$p=\Delta\ \times t$$

(a)  

Krysta listens to 9 minutes of an audiobook every day during her commute to work.

Let d represent the number of days commuting to work and m represent the total number of minutes Krysta listens to the audiobook while commuting.

$$m=\Delta\ \times\ d$$

(a)