document.write( "Question 85500: Please help me with this problem as I am terrible at math. It comes from a worksheet.
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document.write( "John drove to his uncle’s house in a distant city and the trip took 5 hours. When he returned home, there was less traffic and the trip only took 3 hours. If John drove 26 miles per hour faster on the return trip, how fast did he drive each way?\r
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Algebra.Com's Answer #61730 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! John drove to his uncle’s house in a distant city and the trip took 5 hours. When he returned home, there was less traffic and the trip only took 3 hours. If John drove 26 miles per hour faster on the return trip, how fast did he drive each way? \n" ); document.write( ": \n" ); document.write( "Let s = speed to \n" ); document.write( "Then \n" ); document.write( "(s+26) = speed back \n" ); document.write( ": \n" ); document.write( "We know the distance there and back is the same so we can make a simple equation from that fact: \n" ); document.write( "Distance = time * speed: \n" ); document.write( ": \n" ); document.write( "To dist = back dist \n" ); document.write( "5*s = 3(s+26) \n" ); document.write( "5s = 3s + 78 \n" ); document.write( "5s - 3s = 78 \n" ); document.write( "2s = 78 \n" ); document.write( "s = 78/2 \n" ); document.write( "s = 39 mph to, and 39+26 = 65 mph on the return trip \n" ); document.write( "; \n" ); document.write( ": \n" ); document.write( "A good way to check our solution is find the distances, they should be equal: \n" ); document.write( "5 * 39 = 195 \n" ); document.write( "3 * 65 = 195 also, proves our solutions \n" ); document.write( ": \n" ); document.write( "That's not so hard, is it? Did it make sense to you? \n" ); document.write( " \n" ); document.write( " |