document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1043196>Question 1043196</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A man bought a total of 80 feet of materials which are chain links and rope. A chain link cost $2 per foot, and the rope cost $1.50 per foot, and a total of $135 was spent. How much of each did he buy? So, my question here is how do I start the problem and set up an equation to solve it? What's the algebraic analysis and solution? I need your help, please.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #658290 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><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=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=658290\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Name your variables.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=C ALIGN=MIDDLE  ALT=\"C\"   DISABLED_style= \"max-width:90%; height:auto;\" >-feet of chain links purchased<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=R ALIGN=MIDDLE  ALT=\"R\"   DISABLED_style= \"max-width:90%; height:auto;\" >-feet of rope purchased<BR>\n" );
document.write( "Convert the words to algebraic equations,<BR>\n" );
document.write( "Total of 80 feet,<BR>\n" );
document.write( "1.<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=C%2BR=80 ALIGN=MIDDLE  ALT=\"C%2BR=80\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Total of $135,<BR>\n" );
document.write( "2.<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2C%2B1.5R=135 ALIGN=MIDDLE  ALT=\"2C%2B1.5R=135\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Now you have a system of 2 equations with 2 unknowns.<BR>\n" );
document.write( "There are many methods to solve this system.<BR>\n" );
document.write( "You can use substitution.<BR>\n" );
document.write( "From eq. 1,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=C=80-R ALIGN=MIDDLE  ALT=\"C=80-R\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Now substitute this into eq. 2,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2880-R%29%2B1.5R=135 ALIGN=MIDDLE  ALT=\"2%2880-R%29%2B1.5R=135\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=160-2R%2B1.5R=135 ALIGN=MIDDLE  ALT=\"160-2R%2B1.5R=135\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-0.5R=-25 ALIGN=MIDDLE  ALT=\"-0.5R=-25\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=R=50 ALIGN=MIDDLE  ALT=\"R=50\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Now use eq. 1 to solve for <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=C ALIGN=MIDDLE  ALT=\"C\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );