<PRE><B>Question 358886</B>
Let b be the boy&#39;s age.  &lt;br&gt;

Let s be his sister&#39;s age. &lt;br&gt;

{{{b=s+5}}} &lt;br&gt;

or alternatively&lt;br&gt;

{{{b-5=s}}}&lt;br&gt;

The two equations are equivalent.&lt;br&gt;

In both cases, you can easily see that the sister needs to add 5 years to equal her brother&#39;s age.&lt;br&gt;

I hope this helps!&lt;br&gt;</PRE>