document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=25537>Question 25537</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need help on a problem. It is to solve a system of equations by the substitution method. The system is:\r<BR>\n" );
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document.write( "x+3y-1\r<BR>\n" );
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document.write( "x+2y=9 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #13739 by </B><A HREF=/tutors/aboutme.mpl?userid=elima><B>elima(1433)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=elima><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=13739\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x+3y-1 <BR>\n" );
document.write( "x+2y=9<BR>\n" );
document.write( "First solve one of the equations for x;<BR>\n" );
document.write( "x+3y=1<BR>\n" );
document.write( "x=1-3y<BR>\n" );
document.write( "Now substitute that into the other equation for x;<BR>\n" );
document.write( "x+2y=9<BR>\n" );
document.write( "(1-3y)+2y=9<BR>\n" );
document.write( "1-y=9<BR>\n" );
document.write( "-y=9-1<BR>\n" );
document.write( "-y=8<BR>\n" );
document.write( "y=-8<BR>\n" );
document.write( "Now plug the answer for y into the equation to get x;<BR>\n" );
document.write( "x+2(-8)=9<BR>\n" );
document.write( "x-16=9<BR>\n" );
document.write( "x=9+16<BR>\n" );
document.write( "x=25<BR>\n" );
document.write( "Hope you understand<BR>\n" );
document.write( "=) </SPAN>\n" );
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