Alvin's age is two times Elga's age. The sum of their ages is 45 . What is Elga's age?

Question

This is a question that has me confused

Answer 1

Let's say Elga's age is x.

 

Then Alvin's age = 2x

 

x + 2x = 45

 

3x = 45

 

x = 15

 

Elga is 15, and Alvin is 2x = 2 * 15 = 30