document.write( "Question 886322: two trains going in opposite directions leave at the same time train b travels 15 mph faster than train a. in 3 hours the trains are 375 miles apart how fast is each train going \n" ); document.write( "
Algebra.Com's Answer #535841 by josmiceli(19441)\"\" \"About 
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Think of this as 1 train standing still and
\n" ); document.write( "the other one traveling at the sum of their speeds
\n" ); document.write( "Let \"+s+\" = the speed of the slower train
\n" ); document.write( "\"+s+%2B+15+\" = the speed of the faster train
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\n" ); document.write( "\"+375+=+%28+s+%2B+s+%2B+15+%29%2A3+\"
\n" ); document.write( "\"+375+=+%28+2s+%2B+15+%29%2A3+\"
\n" ); document.write( "\"+6s+=+375+-+45+\"
\n" ); document.write( "\"+6s+=+330+\"
\n" ); document.write( "\"+s+=+55+\"
\n" ); document.write( "\"+s+%2B+15+=+70+\"
\n" ); document.write( "The trains are going 55 mi/hr and 70 mi/hr
\n" ); document.write( "check answer:
\n" ); document.write( "\"+d%5B1%5D+=+55%2A3+\"
\n" ); document.write( "\"+d%5B1%5D+=+165+\"
\n" ); document.write( "and
\n" ); document.write( "\"+d%5B2%5D+=+70%2A3+\"
\n" ); document.write( "\"+d%5B2%5D+=+210+\"
\n" ); document.write( "-----------------
\n" ); document.write( "\"+d%5B1%5D+%2B+d%5B2%5D+=+165+%2B+210+\"
\n" ); document.write( "\"+d%5B1%5D+%2B+d%5B2%5D+=+375+\" mi
\n" ); document.write( "OK\r
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