SOLUTION: A girl is 3 times the age of her younger sister, and the sum of their ages is 20. What are the ages of the sisters?

Algebra ->  Customizable Word Problem Solvers  -> Age -> SOLUTION: A girl is 3 times the age of her younger sister, and the sum of their ages is 20. What are the ages of the sisters?      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 963374: A girl is 3 times the age of her younger sister, and the sum of their ages is 20. What are the ages of the sisters?
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
x*3x=20
4x=20
x=20/4
x=5
3x=15