document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=709256>Question 709256</A>: <I><SPAN STYLE=\"word-break: break-all;\"> how do I solve x + 7y = 39 and 3x - 2y = 2 by using substitution?<BR>\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 #436498 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley79><B>checkley79(3341)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley79><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=436498\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x + 7y = 39<BR>\n" );
document.write( "X=39-7Y <BR>\n" );
document.write( "3x - 2y = 2<BR>\n" );
document.write( "3(39-7Y)-2Y=2<BR>\n" );
document.write( "117-21Y-2Y=2<BR>\n" );
document.write( "-23Y=2-117<BR>\n" );
document.write( "-23Y=-115<BR>\n" );
document.write( "Y=-115/-23<BR>\n" );
document.write( "Y=5 ANS.<BR>\n" );
document.write( "X+7*5=39<BR>\n" );
document.write( "X+35=39<BR>\n" );
document.write( "X=39-35<BR>\n" );
document.write( "X=4 ANS.<BR>\n" );
document.write( "PROOF:<BR>\n" );
document.write( "3*4-2*5=2<BR>\n" );
document.write( "12-10=2<BR>\n" );
document.write( "2=2 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );