Question

Alvin is 13 years younger than Elga. The sum of their ages is 27. What is Elga's age?

Answer 1

Explanation:

Let A be Alvin's age and E be Elga's age

A + E = 27

also A + 13 = E

Substitute for A in the first equation

E -13 + E = 27

2E = 40

E = 20, so Elga is 20 years old and Alvin is 7.

Answer 2

14

Explanation:

27-13