document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=259887>Question 259887</A>: <I><SPAN STYLE=\"word-break: break-all;\"> solve by the substitution method and then two ordered pairs!\r<BR>\n" );
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document.write( "9x-9y=-9<BR>\n" );
document.write( "3x+13=y </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #191346 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=191346\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> solve by the substitution method and then two ordered pairs! <BR>\n" );
document.write( "9x-9y=-9<BR>\n" );
document.write( "3x+13=y<BR>\n" );
document.write( "---------------<BR>\n" );
document.write( "Simplify the 1st equation:<BR>\n" );
document.write( "x - y = -1<BR>\n" );
document.write( "----<BR>\n" );
document.write( "Substitute for \"y\" in this equation and solve for \"x\":<BR>\n" );
document.write( "x - (3x+13) = -1<BR>\n" );
document.write( "x - 3x - 13 = -1<BR>\n" );
document.write( "-2x = 12<BR>\n" );
document.write( "x = -6<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Substitute into x-y = -1 to solve for \"y\":<BR>\n" );
document.write( "-6 - y = -1<BR>\n" );
document.write( "y = -5<BR>\n" );
document.write( "==========================<BR>\n" );
document.write( "Solution:<BR>\n" );
document.write( "x = -6, y = -5<BR>\n" );
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document.write( "9x-9y=-9<BR>\n" );
document.write( "3x+13=y<BR>\n" );
document.write( "----------------<BR>\n" );
document.write( "x-y = -1<BR>\n" );
document.write( "3x+13 = y<BR>\n" );
document.write( "--------------<BR>\n" );
document.write( "y = x+1<BR>\n" );
document.write( "y = 3x+13<BR>\n" );
document.write( "--------------<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28400%2C300%2C-10%2C10%2C-10%2C30%2Cx%2B1%2C3x%2B13%29 ALIGN=MIDDLE  ALT=\"graph%28400%2C300%2C-10%2C10%2C-10%2C30%2Cx%2B1%2C3x%2B13%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "===============================================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );