Colin since 53 text messages a day right in equation using two variables to show the relationship between how many text messages he sends a day, d, and the total number of messages he sent, t.
Let's say Colin sends d text messages per day. If he sends d text messages per day for 53 days, the total number of messages he sends, t, can be calculated as t = d * 53. Here, d is the variable representing the number of text messages he sends a day, and t is the variable representing the total number of messages he sent.
