SOLUTION: Five years ago, John's age was half the age of mary. John is 4 years younger than Mary now. How old is John?

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Question 1121938: Five years ago, John's age was half the age of mary. John is 4 years younger than Mary now. How old is John?
Found 2 solutions by Alan3354, ikleyn:
Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
Five years ago, John's age was half the age of mary. John is 4 years younger than Mary now. How old is John?
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Hint: how old were they 5 years ago?
Answer by ikleyn(52817)   (Show Source): You can put this solution on YOUR website!
.
Five years ago John was (still; as always) 4 years younger than Mary and he was half of her age   ====>


    hence, his age then was 4 years, while Mary's age was 8 years at that time.


It means that now John is 4 + 5 = 9 years old, while Mary is 8 + 5 = 13 years old.

Solved.
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There is a bunch of lessons on age word problems
    - Age problems and their solutions
    - A fresh formulation of a traditional age problem
    - Really intricate age word problem
    - Selected age word problems from the archive
    - Age problems for mental solution
in this site.

Read them and become an expert in solving age problems.

Also, you have this free of charge online textbook in ALGEBRA-I in this site
    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.

The referred lessons are the part of this online textbook under the topic "Age word problems".


Save the link to this online textbook together with its description

Free of charge online textbook in ALGEBRA-I
https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson

to your archive and use it when it is needed.


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