document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=695976>Question 695976</A>: <I><SPAN STYLE=\"word-break: break-all;\"> state whether addition, subtraction substitution would be most convenient to solve each system of equations. then solve the system\r<BR>\n" );
document.write( "\n" );
document.write( "x-y=1<BR>\n" );
document.write( "x+y=3<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 #428734 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=428734\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> ADDITION.<BR>\n" );
document.write( "x-y=1<BR>\n" );
document.write( "x+y=3<BR>\n" );
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document.write( "2X=4<BR>\n" );
document.write( "X=4/2<BR>\n" );
document.write( "X=2 ANS.<BR>\n" );
document.write( "2-Y=1<BR>\n" );
document.write( "-Y=1-2<BR>\n" );
document.write( "-Y=-1<BR>\n" );
document.write( "Y=1 ANS.<BR>\n" );
document.write( "PROOF:<BR>\n" );
document.write( "2+1=3<BR>\n" );
document.write( "3=3 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );