document.write( "Question 1127384: The speed of a stream is 5 mph. A boat travels 7 miles upstream in the same time it takes to travel 17 miles downstream. What is the speed of the boat in still​ water? \n" ); document.write( "
Algebra.Com's Answer #743781 by 4198181(13)\"\" \"About 
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Obviously the boat can move itself so to find how fast it moves in still water we would do 17-5 because 5 miles is how far it can move without propelling itself and 17 miles is how far the boat can propel itself and the river will move it. 17-5 is 12 so the speed of the boat in still water is 12mph \n" ); document.write( "
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