Question 1127131
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Let x be the distance averaged at 68 mph  and let y be the distance averaged at 52 mph.


Then your mathematical model consists of these two equations


x + y = 330       miles          (1)       (the total distance equation)

{{{x/68}}} + {{{y/52}}} = 5.3    hours.        (2)        (the total time equation).


Solve it to get the answer.



You also can to reduce the Math model to the only one single equation


{{{x/68}}} + {{{(330-x)/52}}} = 5.3.


Either model will bring you to the same final result.
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