SOLUTION: Tom is 4 times as old as John. In 12 years time Thomas will be twice as old as John. What are their present ages?

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Question 1068705: Tom is 4 times as old as John. In 12 years time Thomas will be twice as old as John. What are their present ages?
Answer by ikleyn(52787) About Me  (Show Source):
You can put this solution on YOUR website!
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T = 4J,                (1)     (now)
T+12 = 2(J+12).        (2)     (in 12 years . . . )


--->  4J + 12 = 2J + 24   --->  2J = 12  --->  J = 6.


Answer.  John is 6 years, Tom is 24 years now.

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
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".