Question 1186125
They each start at the same time at the same place and then travel in opposite directions.

<pre>
               SPEEDS       TIME        DISTANCE

Alexis          r+9          1.5         1.5(r+9)

Mitch            r           1.5         1.5r

TOTAL                                    18
</pre>
{{{highlight_green(1.5(2r+9)=18)}}}

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