Answer:
Elga is 22 years old
Explanation:
Let A = Alvin's age
Let E = Elga's age
We have the equations:
A = E - 11
A + E = 33
Substitute A = E - 11 from the first equation into the second equation and solve for E
So, we have
A + E = 33
(E - 11) + E = 33
2E - 11 = 33
2E = 44
E = 22 years old
So, Alvin is 11 years old and Elga is 22 years old