Algebra.Com's Answer #852686 by ikleyn(53763)![\"\"](\"/images/stars/stars-13.gif\")  
You can put this solution on YOUR website!
.
\n" );
document.write( "How far from an airport can an airplane fly and return in 8 hours, if its outgoing speed is 160 kilometers per hour
\n" );
document.write( "and its returning speed is 240 kilometers per hour?
\n" );
document.write( "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\r
\n" );
document.write( "
\n" );
document.write( "\n" );
document.write( "\r\n" );
document.write( "Let's 'd' be this unknown distance to fly from the airport, in kilometers.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Then the time to fly out is  hours;\r\n" );
document.write( "\r\n" );
document.write( " the time to return back is  hours,\r\n" );
document.write( "\r\n" );
document.write( "and the sum of these two pieces of time is 8 hours\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( " + = 8.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "It is your equation to find 'd'.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "To find it, multiply all the terms by the least common denominator, which is 480.\r\n" );
document.write( "You will get\r\n" );
document.write( "\r\n" );
document.write( " 3d + 2d = 8*480,\r\n" );
document.write( "\r\n" );
document.write( " 5d = 3840,\r\n" );
document.write( "\r\n" );
document.write( " d = 3840/5 = 768 kilometers.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "ANSWER. The distance to fly from the airport is 768 kilometers.\r\n" );
document.write( " \r
\n" );
document.write( "\n" );
document.write( "Solved.\r
\n" );
document.write( "
\n" );
document.write( "
\n" );
document.write( "\n" );
document.write( " \n" );
document.write( " |