Answer:
Elga is 19 and Alvin is 38
Step-by-step explanation:
So The first step is to find out Elgas age. You know that Alvin is 2 two times the age of Elga so you need to Divide 57 by 3. (You divide by three because Alvin is 2 times the age of Elga plus the one part that is Elgas.) The product of 57 divided by 3 is 19. So 19 is the age of Elga. now you multiply 19 by 2 and then you get 38 so 38 is Alvins age. And when you add 38 and 19 you get 57
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