document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=675181>Question 675181</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve the following system using the substitution method:  x=-3y+4 and 3x+9y=12. I know how to solve the equation using the substitution method, but I don't know how to get my answer correct with the y variable.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #419670 by </B><A HREF=/tutors/aboutme.mpl?userid=MathLover1><B>MathLover1(20850)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathLover1><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=MathLover1><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=419670\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> \r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x=-3y%2B4 ALIGN=MIDDLE  ALT=\"+x=-3y%2B4\"   DISABLED_style= \"max-width:90%; height:auto;\" > ...........1...substitute in 2<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3x%2B9y=12 ALIGN=MIDDLE  ALT=\"3x%2B9y=12\"   DISABLED_style= \"max-width:90%; height:auto;\" >.............2<BR>\n" );
document.write( "______________________________\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3%28-3y%2B4%29%2B9y=12 ALIGN=MIDDLE  ALT=\"3%28-3y%2B4%29%2B9y=12\"   DISABLED_style= \"max-width:90%; height:auto;\" >.............2...solve 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;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-9y%2B12%2B9y=12 ALIGN=MIDDLE  ALT=\"-9y%2B12%2B9y=12\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-9y%2B9y=12-12 ALIGN=MIDDLE  ALT=\"-9y%2B9y=12-12\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0=0 ALIGN=MIDDLE  ALT=\"0=0\"   DISABLED_style= \"max-width:90%; height:auto;\" >..............there are an <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=infinite ALIGN=MIDDLE  ALT=\"infinite\"   DISABLED_style= \"max-width:90%; height:auto;\" > number of solutions and the system is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=dependent ALIGN=MIDDLE  ALT=\"dependent\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "so, the two lines are <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=identical ALIGN=MIDDLE  ALT=\"identical\"   DISABLED_style= \"max-width:90%; height:auto;\" > (one lies perfectly <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=on ALIGN=MIDDLE  ALT=\"on\"   DISABLED_style= \"max-width:90%; height:auto;\" ><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+top ALIGN=MIDDLE  ALT=\"+top\"   DISABLED_style= \"max-width:90%; height:auto;\" ><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+of ALIGN=MIDDLE  ALT=\"+of\"   DISABLED_style= \"max-width:90%; height:auto;\" ><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+the ALIGN=MIDDLE  ALT=\"+the\"   DISABLED_style= \"max-width:90%; height:auto;\" ><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+other ALIGN=MIDDLE  ALT=\"+other\"   DISABLED_style= \"max-width:90%; height:auto;\" >) and intersect at <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=all ALIGN=MIDDLE  ALT=\"all\"   DISABLED_style= \"max-width:90%; height:auto;\" > <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=points ALIGN=MIDDLE  ALT=\"points\"   DISABLED_style= \"max-width:90%; height:auto;\" > of both lines  \r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );