Question 1097152
<pre>
The above answer is incorrect.  Sorry, Amalm, but the mother was 
YOUNGER THAN 66 before 1996, when Adam was one-third of her age.
</pre>
In 1996 Adam was 26 years old and his mother was 66 years old.  
In what year was Adam exactly one-third of his mothers age.
<pre>
Let x be the number of years before 1996 that he was one-thid of
his mother's age.

Then x years before 1996, Adam was 26-x
Also x years before 1996, his mother was 66-x

So

{{{26-x=expr(1/3)(66-x)}}}

Solve that for x, beginning by multiplying both sides by 3 to
clear the fraction.  That value of x will be the number of 
years before 1996 that he was one-third of his mother's age. 
Then subtract that number of years from 1996 to find what year 
that was.

Edwin</pre>