A community for students. Sign up today!
Here's the question you clicked on:
 0 viewing
 2 years ago
five year hence,the age of jacob will be three times that of his son.five years ago.jacob's age was seven times that of his son.what is thair present age?
 2 years ago
five year hence,the age of jacob will be three times that of his son.five years ago.jacob's age was seven times that of his son.what is thair present age?

This Question is Closed

sasogeek
 2 years ago
Best ResponseYou've already chosen the best response.1why did u post this in the history section? :o

sasogeek
 2 years ago
Best ResponseYou've already chosen the best response.1Anyways, in 5 years, jacob's age = J+5 in 5 years, his son's age = S+5 but Jacob will be 3 times older than his son, therefore J+5=3(S+5) J+5=3S+15 J=3S+10 (equation 1) 5 years ago, jacob's age = J5 5 years ago, his son's age = S5 but Jacob was 7 times older than his son, therefore J5=7(S5) J5=7S35 J=7S30 (equation 2) this means that 7S30=3S+10 7S3S=10+30 4S=40 S=10 this means that from equation 2, J=7S30 J=7(10)30 J=7030 J=40 Hence their present ages are 70 and 10 :) if you're not clear about anything, do let me know :)
Ask your own question
Ask a QuestionFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.