SOLUTION: mary is three times as old as her son .after twelvue years she is one year less than twice her sons age. what are there present ages.?

Question 259853: mary is three times as old as her son .after twelvue years she is one year less than twice her sons age. what are there present ages.?
Found 2 solutions by scott8148, drk:
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
m = 3s

m + 12 = 2(s + 12) - 1 ___ m + 12 = 2s + 24 -1 ___ m = 2s + 11

3s = 2s + 11 ___ s = 11

m = 33
Answer by drk(1908) (Show Source): You can put this solution on YOUR website!
Let m = mary, and s = son.
From above, we get
m = 3s
m+12 = 2(s+12) - 1
By substitution, we get
3s + 12 = 2s + 23
s = 11
m = 33
RELATED QUESTIONS
Please help me with this application problem: Mary is three times as old as her son.... (answered by MathLover1)
Please help me solve this word problem, thanks: Mary is 3 times as old as her son.... (answered by mananth)
Two years less than three times Mary�s current age is the same as one year less than two... (answered by ankor@dixie-net.com)
katie is 3 times as old as her son, after fifteen years she will be twice as old as her... (answered by josmiceli)
Mary is thress times as old as her son. in 12 years, marys age will be 1 year less than... (answered by zephyr)
julie is three times as old as her son. in 12 years, Julie's age will be one year less... (answered by ikleyn)
A mother is three times as old as her son. After 15 years she will be twice as old as her (answered by Fombitz)
a woman is 40 years old. 8 years ago she was 4 times as old as her son. what is the sons... (answered by Alan3354)
5 years ago Mary was 5 times as old as her Son. 5 years hence her age will be 8 less than (answered by mananth)