[tex]\\ \text{Given that Jamal is x years old.}\\ \text{His mother is 28 years older than Jamal, so the age of mother is}\\ =x+28\\ \\ \text{and Jamal's uncle is two times older than Jamal's mother, so}\\ \text{the expression that give his uncle's age is}=2(\text{ mother's age})\\ \\ =2(x+28)\\ \\ =2x+56[/tex]
Hence, the expression that represents Jamal's uncle age in years is: 2x+56