Question 1120787
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Let D be the distance under the question (one way distance).


Then you have this time equation


    {{{D/18}}} + {{{D/12}}} = 5   hours (showing the sum oftimes in each direction).


To solve it, multiply both sides by 36. You will get


    2D + 3D = 5*36


    5D = 5*36   ====>  D = 36.


<U>Answer</U>.  One way distance is 36 miles.


<U>Check</U>.   {{{36/18}}} + 36/12}}} = 2 + 3 = 5.    ! Correct !
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Solved.