document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=73698>Question 73698</A>: <I><SPAN STYLE=\"word-break: break-all;\"> x+9y=9<BR>\n" );
document.write( "3x+6y=6\r<BR>\n" );
document.write( "\n" );
document.write( "chapter 7 summary & reviw. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #52702 by </B><A HREF=/tutors/aboutme.mpl?userid=tazoftroy><B>tazoftroy(22)</B></A><img src=\"/images/stars/stars-07.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=tazoftroy><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=52702\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> An equation with two variables may look hard, but it's really pretty easy.<BR>\n" );
document.write( "First, set up the equation like so:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2B9y=9 ALIGN=MIDDLE  ALT=\"x%2B9y=9\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3x%2B6y=6 ALIGN=MIDDLE  ALT=\"3x%2B6y=6\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Now, multiply the top equation by 3 so that the x's in each equation can be removed by use of subtraction:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3x%2B6y=6 ALIGN=MIDDLE  ALT=\"3x%2B6y=6\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3x%2B6y=6 ALIGN=MIDDLE  ALT=\"3x%2B6y=6\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Now, subtract the two. This is what you get:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=21y=21 ALIGN=MIDDLE  ALT=\"21y=21\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Thus, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=1 ALIGN=MIDDLE  ALT=\"y=1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Finally, plug in the value for <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y ALIGN=MIDDLE  ALT=\"y\"   DISABLED_style= \"max-width:90%; height:auto;\" > into any equation.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2B9%281%29=9 ALIGN=MIDDLE  ALT=\"x%2B9%281%29=9\"   DISABLED_style= \"max-width:90%; height:auto;\" >;<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=0 ALIGN=MIDDLE  ALT=\"x=0\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );