Question 855284
<pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
Let x represent Kent's time   
 {{{ 1/x + 1/2x = 1/4 }}}    |Multiplying thru by 4x so as all denominators = 1
   4 + 2 = x
    6hr = x, Kent's time.  Brent takes 12hr  
CHECKING our answer***
 {{{1/6 + 1/12 = 2/12 + 1/12 = 3/12 = 1/4}}}
Wish You the Best in your Studies.