Question 618716
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Hi,
Re TY, Good Luck to You! 
The toughest part of most word Problems is assigning that first variable!
For Myself, use the example of just getting that done as the{{{highlight(1st)}}} step.
One plane travels 65km/h slower than the other traveling at {{{highlight(r)}}}
D = rt 
 2hr(r-65) + 2hr(r) = 3438mi
    4r = 3568
     r = 892 mph and the other rate is 827mph
 CHECKING our Answer***
 2hr· 892mph + 2hr· 827mph = 3438mi