Question 851152
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Hi,
Lt x represent time working together
 {{{1/6 + 1/9 = 1/x}}}    |Multiplying thru by 18x so as all denominators = 1
   3x + 2x = 18
     5x = 18
      x = 18/5 days  0r   3 <sup>3</sup>&frasl;<sub>5</sub>  days