Question 1084487
<pre>
                     SPEED        TIME        DISTANCE

WITH WIND             600         x            600x

AGAINST WIND          550         5-x         550(5-x)

TOTALS                             5           2900
</pre>


{{{cross(600x+500(5-x)=2900)}}}
{{{highlight_green(600x+550(5-x)=2900)}}}


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