document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=218205>Question 218205</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need to graph these equations and determine where they meet.  I am stumped\r<BR>\n" );
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document.write( "20x + 400\r<BR>\n" );
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document.write( "10x + 600 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #164340 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=164340\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I need to graph these equations and determine where they meet. I am stumped <BR>\n" );
document.write( "y = 20x + 400 <BR>\n" );
document.write( "y = 10x + 600<BR>\n" );
document.write( "--------------------<BR>\n" );
document.write( "Use a couple of points to graph each equation:<BR>\n" );
document.write( "y=20x+400<BR>\n" );
document.write( "If x = 0, y = 400 giving you point (0,400)<BR>\n" );
document.write( "If x = -10, y = 200 giving you point (-10,200)<BR>\n" );
document.write( "---------------<BR>\n" );
document.write( "y = 10x + 600<BR>\n" );
document.write( "If x = 0, y = 600 giving you point (0,600)<BR>\n" );
document.write( "If x = -10, y = 500 giving you point (-10,500)<BR>\n" );
document.write( "--------------------<BR>\n" );
document.write( "If you want to find the intersection of the two lines:<BR>\n" );
document.write( "Substitute for \"y\" and solve for \"x\":<BR>\n" );
document.write( "20x + 400 = 10x + 600<BR>\n" );
document.write( "10x = 200<BR>\n" );
document.write( "x = 20<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Substitute for x and solve for \"y\":<BR>\n" );
document.write( "y = 20*20 + 400<BR>\n" );
document.write( "y = 400 + 400<BR>\n" );
document.write( "y = 800<BR>\n" );
document.write( "----------------------<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28400%2C300%2C-20%2C40%2C-20%2C900%2C20x%2B400%2C10x%2B600%29 ALIGN=MIDDLE  ALT=\"graph%28400%2C300%2C-20%2C40%2C-20%2C900%2C20x%2B400%2C10x%2B600%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );