document.write( "Question 179245: A train leaves Chicago going west. A second train leaves Chicago going east an hour earlier. The train going west travels at 51 mph while the train going east travels 87mph. How long the train headed west leaves are the trains 439 miles apart. \n" ); document.write( "
Algebra.Com's Answer #134194 by ankor@dixie-net.com(22740)\"\" \"About 
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A train leaves Chicago going west. A second train leaves Chicago going east an
\n" ); document.write( " hour earlier. The train going west travels at 51 mph while the train going east
\n" ); document.write( " travels 87 mph. How long the train headed west leaves are the trains 439 miles apart.
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\n" ); document.write( "Let t = travel time of the westbound train
\n" ); document.write( "then
\n" ); document.write( "(t+1) = travel time of the eastbound train
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\n" ); document.write( "Write a distance equation: dist = speed * time
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\n" ); document.write( "East dist + west dist = 439
\n" ); document.write( "87(t+1) + 51t = 439
\n" ); document.write( "87t + 87 + 51t = 439
\n" ); document.write( "87t + 51t = 439 - 87
\n" ); document.write( "138t = 352
\n" ); document.write( "t = \"352%2F138\"
\n" ); document.write( "t = 2.55 hrs they will be 439 miles apart (from the time the westbound train leaves)
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\n" ); document.write( "Check solution:
\n" ); document.write( "2.55*51 = 130
\n" ); document.write( "3.55*87 = 309 (travel time 1 hr longer)
\n" ); document.write( "---------------
\n" ); document.write( "total d = 439 mi
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