document.write( "Question 909135: The speed of a stream is 5mph. A boat travels 8 miles upstream in the same time it takes to travel 18 miles downstream. What is the speed of the boat in still water? \n" ); document.write( "

Algebra.Com's Answer #551629 by clearblueskai(22) $\"\"$ $\"About$

You can put this solution on YOUR website!
x - speed of the boat in still water
\n" ); document.write( "x-5 - speed of the boat upstream
\n" ); document.write( "x+5 - speed of the boat downstream \r
\n" ); document.write( "\n" ); document.write( " $\"speed=%28distance%29%2F%28time%29\"$
\n" ); document.write( "Downstream: $\"x%2B5=18%2Ft\"$
\n" ); document.write( " $\"t=18%2F%28x%2B5%29\"$
\n" ); document.write( "since time is the same,
\n" ); document.write( "Upstream:
\n" ); document.write( " $\"x-5=8%2F%2818%2F%28x%2B5%29%29\"$
\n" ); document.write( " $\"x=13\"$ \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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