document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=465516>Question 465516</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve using the elimination method. -7x – y = -30 4x + y = 21 \r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #319011 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=319011\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> -7x - y = -30<BR>\n" );
document.write( "4x + y = 21<BR>\n" );
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document.write( "-3x = -9 {added the two equations together, eliminating the y}<BR>\n" );
document.write( "x = 3 {divided both sides by -3}\r<BR>\n" );
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document.write( "4x + y = 21 {original bottom equation}<BR>\n" );
document.write( "4(3) + y = 21 {substituted 3, in for x, into 4x + y = 21}<BR>\n" );
document.write( "12 + y = 21 {multiplied 4 by 3}<BR>\n" );
document.write( "y = 9 {subtracted 12 from both sides}\r<BR>\n" );
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document.write( "x = 3 and y = 9<BR>\n" );
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