document.write( "Question 904534: tim and galen were walking toward town at 3 km per hour. half an hour later, liz and tammy left from the same point and walked in the same direction at 4 km per hour. for how many hours had the boys walked when the girls caught up with them? \n" ); document.write( "
Algebra.Com's Answer #548757 by ewatrrr(24785)\"\" \"About 
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t time boys walked
\n" ); document.write( "D = rt
\n" ); document.write( "3t = 4(t-.5)
\n" ); document.write( "2hr = t, time boys had walked when girls caught up
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