The term 3s represent three times of Sydney's age.
It is given that:
Luke is 5 years younger than 3 times sydney’s age, s in this solution.
This means that the age of Luke is represented in terms of s with the help of the expression:
[tex]\text{Age of luke}=3s-5[/tex]
Hence, we get that the term 3s represent three times the age of Sydney.