document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=622109>Question 622109</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Arif walks for x hours at 5km/h and runs for y hours at 10km/h.  He travels a total of 35km and his average speed is 7km/h.  Find the value of x and y.\r<BR>\n" );
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document.write( "I have worked out that distance divided by speed = time which is 5 hours but got stuck from there - not sure how to divide the walking and running so that the average speed = 7km/h.  \r<BR>\n" );
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document.write( "Thanks in advance. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #391120 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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/cgi-bin/show-face.mpl?user=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=391120\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Arif walks for x hours at 5km/h and runs for y hours at 10km/h.  He travels a total of 35km and his average speed is 7km/h.  Find the value of x and y.<BR>\n" );
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document.write( "5x + 10y = 35 (distance) --> x + 2y = 7<BR>\n" );
document.write( "t = d/r = 35/7 = 5 hours<BR>\n" );
document.write( "x + y = 5<BR>\n" );
document.write( "x + 2y = 7<BR>\n" );
document.write( "---------------- Subtract<BR>\n" );
document.write( "-y = -2<BR>\n" );
document.write( "y = 2<BR>\n" );
document.write( "x = 3<BR>\n" );
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