document.write( "Question 121626: the speed of a stream is 4mph. a boat travels 2miles upstream in the same time it takes to travel 10 miles downstream. What is the speed of the boat in still water? \n" ); document.write( "

Algebra.Com's Answer #89317 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"s+=+4\"$ mi/hr = speed of stream
\n" ); document.write( " $\"b\"$ = speed of boat in still water
\n" ); document.write( " $\"2+%2F+%28b+-+s%29+=+10+%2F+%28b+%2B+s%29\"$
\n" ); document.write( " $\"2+%2F+%28b+-+4%29+=+10+%2F+%28b+%2B+4%29\"$
\n" ); document.write( "multiply both sides by $\"%28b+-+4%29%28b+%2B+4%29\"$
\n" ); document.write( " $\"2%28b+%2B+4%29+=+10%28b+-+4%29\"$
\n" ); document.write( " $\"2b+%2B+8+=+10b+-+40\"$
\n" ); document.write( " $\"8b+=+48\"$
\n" ); document.write( " $\"b+=+6\"$ mi/hr \n" ); document.write( "

\n" );