Question 1128637
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Let x be the Leroy' speed, in miles per hour.


Then the Juanita' speed is (x+9) mph.


Leroy spent {{{448/x}}} hours;  Juanita spent {{{511/(x+9)}}} hours.


The condition says


{{{448/x}}} = {{{511/(x+9)}}}.


Cross multiply and solve for x.
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