document.write( "Question 910897: Manuel traveled 2 hours nonstop to Mexico, a total of 80 miles. He took a train part of the way, which averaged 50mph, and then took a bus the remaining distance, which averaged 30mph. How long was Manuel on the train? \n" ); document.write( "
Algebra.Com's Answer #552749 by richwmiller(17219)\"\" \"About 
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x+y=2,
\n" ); document.write( "50*x+30*y=80
\n" ); document.write( "x=2-y
\n" ); document.write( "50*(2-y)+30*y=80
\n" ); document.write( "100-50y+30*y=80
\n" ); document.write( "-20*y=-20
\n" ); document.write( "y=1
\n" ); document.write( "x=2-y
\n" ); document.write( "x=1 hour at 50 and y=1 hour at 30
\n" ); document.write( "check
\n" ); document.write( "1+1=2
\n" ); document.write( "50*x+30*y=80
\n" ); document.write( "50*1+30*1=80
\n" ); document.write( "50+30=80
\n" ); document.write( "80=80
\n" ); document.write( "ok
\n" ); document.write( " \n" ); document.write( "
\n" );