SOLUTION: Seven years ago, Martin’s age was one third of the age he will be in 9 years. How old is he now?

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Question 1114246: Seven years ago, Martin’s age was one third of the age he will be in 9 years. How old is he now?
Answer by ikleyn(52787) About Me  (Show Source):
You can put this solution on YOUR website!
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The problem says that


M - 7 = %281%2F3%29%2A%28M%2B9%29,


where M is the Martin's age today.


Simplify and solve for M


3M - 21 = M + 9

3M - M = 9 + 21

2M = 30  ====>  M = 30%2F2 = 15.


Answer.  Martin is 15 years now.

Solved.

Check the solution on your own.

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On age word problems,  see the lessons
    - 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.

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    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.

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


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to your archive and use it when it is needed.