document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=540795>Question 540795</A>: <I><SPAN STYLE=\"word-break: break-all;\"> solve by the substitution method 3x+7y=39 and -8+y=73 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #353869 by </B><A HREF=/tutors/aboutme.mpl?userid=fcabanski><B>fcabanski(1391)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=fcabanski><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=353869\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> -8+y=73<P><BR>\n" );
document.write( "Add 8 to both sides.<P><BR>\n" );
document.write( "y=81.<P><BR>\n" );
document.write( "Substitute that into the first equation.<P><BR>\n" );
document.write( "3x+7(81)=39<P><BR>\n" );
document.write( "3x+567=39<P><BR>\n" );
document.write( "3x=-528<P><BR>\n" );
document.write( "x=-176<BR>\n" );
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