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.