document.write( "Question 553302: Two planes left an airport at noon. One flew east at a certain speed and the other flew west at twice the speed. The planes were 2700 mi apart in 3 h. How fast was each plane flying? \n" ); document.write( "
Algebra.Com's Answer #360784 by mananth(16946)\"\" \"About 
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east plane speed =x
\n" ); document.write( "west plane speed = 2x\r
\n" ); document.write( "\n" ); document.write( "they are moving away from each other.\r
\n" ); document.write( "\n" ); document.write( "add up speeds = 2x+x=3x\r
\n" ); document.write( "\n" ); document.write( "d= rt
\n" ); document.write( "d= 2700
\n" ); document.write( "r= 3x
\n" ); document.write( "t=3 hours
\n" ); document.write( "2700 = 3x*3
\n" ); document.write( "2700/9 =x
\n" ); document.write( "x=300\r
\n" ); document.write( "\n" ); document.write( "east plane 300 mph
\n" ); document.write( "west plane 600 mph
\n" ); document.write( "
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