document.write( "Question 310480: Harold Phoenix-Person drove for 3 hours on I-10, then decreased his speed by 10 miles per hour for the next 3 hours. If his total trip was 360 miles, what was his speed the first hour of his trip in miles per hour? \n" ); document.write( "
Algebra.Com's Answer #221972 by stanbon(75887)\"\" \"About 
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Harold Phoenix-Person drove for 3 hours on I-10, then decreased his speed by 10 miles per hour for the next 3 hours. If his total trip was 360 miles, what was his speed the first hour of his trip in miles per hour?
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\n" ); document.write( "1st leg DATA:
\n" ); document.write( "time = 3 hrs ; rate = x mph ; distance = 3x miles
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\n" ); document.write( "2nd leg DATA:
\n" ); document.write( "time = 3 hrs ; rate = x-10 mph ; distance = 3(x-10) miles
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\n" ); document.write( "Equation:
\n" ); document.write( "miles + miles = 360
\n" ); document.write( "3x + 3x-30 = 360
\n" ); document.write( "6x = 390
\n" ); document.write( "x = 65 mph (rate during the 1st 3 hrs)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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