document.write( "Question 483440: An athlete runs at 9 mph and then at 12 mph, covering 10 miles in 1hour. How long does the athlete run at each speed? \n" ); document.write( "
Algebra.Com's Answer #332093 by jorel1380(3719)\"\" \"About 
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9n+12(1-n)=10
\n" ); document.write( "9n+12-12n=10
\n" ); document.write( "3n=2
\n" ); document.write( "n=2/3
\n" ); document.write( "The athlete ran at 9 mph for 2/3 hours; and at 12 mph for 1/3 hours..
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