Question 855331
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Hi,
what is the speed {{{ highlight_green(x)}}}in still water? 
{{{6mi/(x-4mph) = 12mi/(x+4mph)}}}
   12x - 48 = 6x + 24
       6x = 72
        x = 12mph
CHECKING our answer***
{{{6/8 = 12/16 = 3/4}}}  Note 3/4 hr is the time it took going up and back, as well.
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