Question 1021567
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Hello Sir/Madam Im in confusion on age problems. 
When should take plus(addition) and when should take minus(subtraction) if  the word years ago  occurs in a problem
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If your unknown is the present age, and you want to express on how it was "n years ago", then use "-" (minus).


If you want to express on how it will be  "in n years in the future", then use "+" (plus).


   . . . With years people become older . . . 
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It would be even better if you send your concrete problem.


Also see numerous examples of solved age problems in the lesson <A HREF=http://www.algebra.com/algebra/homework/word/age/Age-problems-and-their-solutions.lesson>Age problems and their solutions</A> in this site.