document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=428601>Question 428601</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve for x and y using addition or substitution.\r<BR>\n" );
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document.write( "2x -3y = 4<BR>\n" );
document.write( "2x + y = -4 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #297873 by </B><A HREF=/tutors/aboutme.mpl?userid=algebrahouse.com><B>algebrahouse.com(1659)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=algebrahouse.com><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=algebrahouse.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=297873\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Solve for x and y using addition or substitution.\r<BR>\n" );
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document.write( "2x - 3y = 4 ------> -2x + 3y = -4 {multiplied top equation by -1}<BR>\n" );
document.write( "2x + y = -4 -------> 2x + y = -4 {bottom equation stays the same}\r<BR>\n" );
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document.write( "4y = -8 {added the two equations together}<BR>\n" );
document.write( "y = -2 {divided both sides by 4}\r<BR>\n" );
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document.write( "2x + y = -4 {bottom equation}<BR>\n" );
document.write( "2x - 2 = -4 {substituted -2, in for y, into bottom equation}<BR>\n" );
document.write( "2x = -2 {added 2 to both sides}<BR>\n" );
document.write( "x = -1 {divided both sides by 2}\r<BR>\n" );
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document.write( "x = -1 and y = -2<BR>\n" );
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