Question 1071428
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Let  be the distance in one (in each) direction, in miles.

Then your governing equation is

{{{D/60 - D/70}}} = {{{1/3}}}.

It is the "time equation". Each member of the equation is time.

To solve it, multiply both sides by 60*70. You will get

70D - 60D = 1400,  ---> 10D = 1400  ---> D = {{{1400/10}}} = 140.

<U>Answer</U>.  The distanse is 140 miles.
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