Question 994775
<pre>
PERSON        speed        time        distance
Ryan           r           3+2=5        r*5
Garbiella     r+42         2            (r+42)*2
</pre>


The distance column is the "catch-up" distance, and each expression is the same quantity; the expressions are equal.


{{{r*5=(r+42)*2}}}
{{{5r=2r+84}}}
{{{3r=84}}}
{{{r=7*12/3}}}
{{{highlight(r=28)}}}