document.write( "Question 360209: Greg rides his bike 15 miles in the same amount of time glen rides his bike 21 miles. Glen is traveling 12mph faster than Greg. What if gregs speed? \n" ); document.write( "
Algebra.Com's Answer #257133 by mananth(16949)\"\" \"About 
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Greg rides his bike 15 miles in the same amount of time glen rides his bike 21 miles. Glen is traveling 12mph faster than Greg. What if gregs speed?
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\n" ); document.write( "Greg speed be x mph
\n" ); document.write( "Glen speed x+12 mph
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\n" ); document.write( "t=d/r
\n" ); document.write( "15/x = 21/(x+12)
\n" ); document.write( "15(x+12)=21x
\n" ); document.write( "15x+180=21x
\n" ); document.write( "180=6x
\n" ); document.write( "x= 30 mph ------ greg
\n" ); document.write( "30+12 = 42 mph ---- glen's speed
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\n" ); document.write( "m.ananth@hotmail.ca
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