SOLUTION: Juan is 8 years older than his sister. In 3 years, he will be twice as old as she will be then. How old are they now?

Algebra ->  Customizable Word Problem Solvers  -> Age -> SOLUTION: Juan is 8 years older than his sister. In 3 years, he will be twice as old as she will be then. How old are they now?      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 268275: Juan is 8 years older than his sister. In 3 years, he will be twice as old as she will be then. How old are they now?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
j = s + 8

j + 3 = 2(s + 3)

substituting ___ (s + 8) + 3 = 2s + 6 ___ 5 = s

j = 5 + 8 = 13