Question 998637
<pre>
            rate         time        distance
Manuel       3r           t             90
Pablo         r           t+2           90
</pre>


RT=D relates rate time distance.


{{{system(3rt=90,r(t+2)=90)}}}


{{{system(rt=30,rt+2r=90)}}}


{{{30+2r=90}}}


{{{2r=90-30=60}}}


{{{highlight(r=30)}}}