Question 702272
There was another one like this earlier, and the time information was lacking.  This one here is better.

Let r = speed of the slower car.  


Car ------Speed, km/h-------Time, hours----------Distance, km
Fast car___r+7______________2____________________{{{(r+7)*2}}}
Slow car____r ______________2 ___________________{{{r*2}}}


The cars start 300 km apart and move toward each other, so sum of all lengths or distances must be 300.


{{{(r+7)*2+34+r*2=300}}}
Find r.
Compute r+7.