document.write( "Question 74234: I need help setting up this problem so I can solve it. Can anyone please help? \r
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document.write( "A motor boat can run 25 mph in still water. The boat starts at 7:00 am going upstream in a river whose current runs at 5 mph. How far up the river can the boat go and still be back at 12:00 noon? \r
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document.write( "Thank You! \n" );
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Algebra.Com's Answer #53234 by checkley75(3666)![]() ![]() ![]() You can put this solution on YOUR website! DISTANCE=RATE*TIME. THE TWO DISTANCES ARE THE SAME THUS WE HAVE: \n" ); document.write( "20X=30(5-X) \n" ); document.write( "20X=150-30X \n" ); document.write( "20X=30X=150 \n" ); document.write( "50X=150 \n" ); document.write( "X=150/50 \n" ); document.write( "X=3 HOURS GOING UP STEAM. THUS 2 HOURS(5-3=2) RETURN DOWN STREAM. \n" ); document.write( "PROOF \n" ); document.write( "20*3=30(5-3) \n" ); document.write( "60=30*2 \n" ); document.write( "60=60 \n" ); document.write( " |