Question 1042685
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A small motorboat travels 13 mph in still water.  It takes 2 hours longer to travel 60 miles going upstream 
than it does going downstream. Find the rate of the current.
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<pre>
{{{60/(13-x) - 60/(13+x)}}} = {{{2}}}

Multiply both sides of the equation by (13-x)*(13+x) 

60*(13+x) - 60*(13-x) = {{{2*(169-x^2)}}},

120x = {{{338 - 2x^2}}}    <--- Your mistake was here.

2x^2 + 120x - 338 = 0,

x^2 + 60x - 169 = 0.   

Can you complete it from this point ?
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