document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=329888>Question 329888</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve the system by substitution<BR>\n" );
document.write( "x + 7y = -2<BR>\n" );
document.write( "3x + y =34 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #237169 by </B><A HREF=/tutors/aboutme.mpl?userid=privani><B>privani(34)</B></A><img src=\"/images/stars/stars-07.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=privani><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=237169\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x + 7y = -2<BR>\n" );
document.write( "x = -2 - 7y    .............(1)\r<BR>\n" );
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document.write( "3x + y =34     .............(2)\r<BR>\n" );
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document.write( "Substitute (1) in (2)<BR>\n" );
document.write( "3x + y =34<BR>\n" );
document.write( "3(-2-7y)+y=34<BR>\n" );
document.write( "-6-21y+y=34<BR>\n" );
document.write( "-20y=34+6<BR>\n" );
document.write( "-20y=40<BR>\n" );
document.write( "y=40/-20<BR>\n" );
document.write( "y=-2\r<BR>\n" );
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document.write( "Substitute y=-2 in (1)<BR>\n" );
document.write( "x=-2-7y<BR>\n" );
document.write( "x=-2-7(-2)<BR>\n" );
document.write( "x=-2+14<BR>\n" );
document.write( "x=12 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );