Answer:
Sammy's age is 8 years.
Explanation:
Let s represent Sammy’s age.
We have been given that Lisa’s age is 4 years older than three times Sammy’s age.
Three times Sammy’s age would be
.
4 years older than three times Sammy’s age would be
.
We are also told that Lisa is 28 years old. We can represent this information in an equation as:





Therefore, Sammy's age would be 8 years.