Question 1209904
<br>
Simon is one-fifth of Danielle's age -- i.e., Danielle is 5 times as old as Simon:<br>
Let x be Simon's age
Then Danielle's age is 5x.<br>
In 6 years, their ages will be x+6 and 5x+6.  At that time, Simon will be one-third as old as Danielle -- i.e., she will be 3 times as old as he is:<br>
{{{5x+6=3(x+6)}}}
{{{5x+6=3x+18}}}
{{{2x=12}}}
{{{x=6}}}<br>
Simon's age is x = 6
Danielle's age is 5x = 30<br>
ANSWER: Danielle is 30<br>