Problema Solution

Alvin is

15

years older than Elga. The sum of their ages is

69

. What is Elga's age?

Answer provided by our tutors

Let

x = the age of Alvin

y = the age of Elga

Alvin is 15 years older than Elga

x = 15 + y

The sum of their ages is 69:

x + y = 69

We need to solve the following system of equations:

x = 15 + y

x + y = 69

........

click here to see the system of equations solved for x and y

........

x = 42 years

y = 27 years

Alvin is 42 years old.

Elga is 27 years old.