document.write( "Question 1158432: It takes a person the same time to walk 10 miles as it takes a car to travel 15 miles in heavy traffic. If the car is traveling 3 mph faster than the person walking. How fast is each traveling?\r
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Algebra.Com's Answer #781380 by ikleyn(52847) $\"\"$ $\"About$

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document.write( "Let x be the speed of the person, in miles per hour.\r\n" );
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document.write( "Then the speed of the car is (x+3) mph, according to the condition.\r\n" );
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document.write( "The time walking 10 miles is    hours.\r\n" );
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document.write( "The time driving 15 miles is    hours.\r\n" );
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document.write( "Both times are the same --- so, you can write this equation\r\n" );
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document.write( "     = .\r\n" );
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document.write( "Cross multiply; then simplify\r\n" );
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document.write( "    10*(x+3) = 15x\r\n" );
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document.write( "    10x + 30 = 15x\r\n" );
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document.write( "    30       = 15x - 10x\r\n" );
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document.write( "    30       = 5x\r\n" );
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document.write( "     x       = 30/5 = 6.\r\n" );
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document.write( "ANSWER.  Walking speed is 6 miles per hour.  Driving speed is 6+3 = 9 miles per hour.\r\n" );
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