SOLUTION: John is three times as old as Mary and the sum of their ages is 24. find their ages

Algebra ->  Customizable Word Problem Solvers  -> Age -> SOLUTION: John is three times as old as Mary and the sum of their ages is 24. find their ages      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 613901: John is three times as old as Mary and the sum of their ages is 24. find their ages
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
John is three times as old as Mary and the sum of their ages is 24. find their ages
---
Equations:
j = 3*m
j+m = 24
----
xubstitute for "j" and solve for "m":
3m + m = 24
4m= 24
Mary = 6 years
----
solve for "j":
j = 3m
John = 3*6
John = 18 years
====================
cheers,
Stan H.