document.write( "Question 250355: An Amtrak train leaves Penn Station, NYC, traveling south at 60mph. Three hours later, a Metroliner leaves the same station traveling south at 80mph. How long will it take the Metroliner to catch up to the Amtrak train. \n" ); document.write( "
Algebra.Com's Answer #182305 by checkley77(12844)\"\" \"About 
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D=RT
\n" ); document.write( "D=60T
\n" ); document.write( "D=80(T-3)
\n" ); document.write( "SET THE 2 DISTANCES EQUAL.
\n" ); document.write( "60T=80(T-3)
\n" ); document.write( "60T=80T-240
\n" ); document.write( "60T-80T=-240
\n" ); document.write( "-20T=-240
\n" ); document.write( "T=-240/-20
\n" ); document.write( "T=12 HOURS THEY WILL MEET.
\n" ); document.write( "PROOF:
\n" ); document.write( "60*12=80(12-3)
\n" ); document.write( "720=80*9
\n" ); document.write( "720=720
\n" ); document.write( "
\n" );