Question 1163280
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This equation


    {{{1/x}}} + {{{1/(x+1)}}} = {{{9/20}}}


can be easily solved mentally:  x = 4 minutes.


<U>CHECK</U>.  {{{1/4}}} + {{{1/5}}} = {{{5/20}}} + {{{4/20}}} = {{{9/20}}}.   ! Correct !



<U>ANSWER</U>.  4 minutes for the first lady and 5 minutes for the second lady.
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