document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1019446>Question 1019446</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need help solving a math problem. I'm supposed to use the substitution method then elimination. I figured out the equations, but I'm confused on what to do next.\r<BR>\n" );
document.write( "\n" );
document.write( "x + y + z = 34\r<BR>\n" );
document.write( "\n" );
document.write( "1x + 5y + 20z = 237\r<BR>\n" );
document.write( "\n" );
document.write( "y = z - 1\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #635393 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=635393\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x + y + z = 34<BR>\n" );
document.write( "1x + 5y + 20z = 237<BR>\n" );
document.write( "y = z - 1 <BR>\n" );
document.write( "Substitute y=z-1 into the first two.<BR>\n" );
document.write( "x+z-1+z=34; x+2z=35<BR>\n" );
document.write( "x+5z-5+20z=237; x+25z=242<BR>\n" );
document.write( "===========================<BR>\n" );
document.write( "x+2z=35<BR>\n" );
document.write( "-x-25z=-242<BR>\n" );
document.write( "-23z=-207<BR>\n" );
document.write( "z=9<BR>\n" );
document.write( "y=8<BR>\n" );
document.write( "x=17<BR>\n" );
document.write( "or (17,8,9)<BR>\n" );
document.write( "=========================<BR>\n" );
document.write( "check in 2<BR>\n" );
document.write( "17+5(8)+20(9)=17+40+180=237 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );