document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=708693>Question 708693</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Two planes start from Los Angeles International Airport and fly in opposite directions. The second plane starts 1/2 hour after the first plane, but its speed is 80 kilometers per hour faster. Find the airspeed of each plane if 2 hours after the first plane departs the planes are 3200 kilometers apart.\r<BR>\n" );
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document.write( "Make a system to solve. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #436199 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=436199\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Two planes start from Los Angeles International Airport and fly in opposite directions. The second plane starts 1/2 hour after the first plane, but its speed is 80 kilometers per hour faster. Find the airspeed of each plane if 2 hours after the first plane departs the planes are 3200 kilometers apart. <BR>\n" );
document.write( "Make a system to solve.<BR>\n" );
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document.write( "let x=speed of the first plane<BR>\n" );
document.write( "x+80=speed of the second plane<BR>\n" );
document.write( "distance=speed*travel time<BR>\n" );
document.write( "travel time of first plane=2 hrs<BR>\n" );
document.write( "travel time of second plane=1.5 hrs<BR>\n" );
document.write( "..<BR>\n" );
document.write( "2x+1.5(x+80)=3200<BR>\n" );
document.write( "2x+1.5x+120=3200<BR>\n" );
document.write( "3.5x=3080<BR>\n" );
document.write( "x=880<BR>\n" );
document.write( "x+80=960<BR>\n" );
document.write( "speed of the first plane=880 km/hr<BR>\n" );
document.write( "speed of the second plane=960 km/hr </SPAN>\n" );
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