Hi

Distance the same at both rates: Let x represent time taken traveling back.

25mphx = 18mph(2-x)

 43x = 36

   x = 36/43 hr, time traveling back

       D = 25*(36/43) = 20.93mi



20.93mi = 18*(2-36/43) = 18(86/43-36/43) = 18*(50/43) = 

  

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