document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1102710>Question 1102710</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve the system of equation by the substitution method\r<BR>\n" );
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document.write( "x+y=20<BR>\n" );
document.write( "5x+y=0 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #717417 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=717417\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x + y = 20<BR>\n" );
document.write( "5x + y = 0 ----> y = -5x  {subtracted 5x from each side}\r<BR>\n" );
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document.write( "x - 5x = 20   {substituted -5x, in for y, into first equation}<BR>\n" );
document.write( "-4x = 20   {combined like terms}<BR>\n" );
document.write( "x = -5   {divided each side by -4}\r<BR>\n" );
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document.write( "x + y = 20   {first equation}<BR>\n" );
document.write( "-5 + y = 20   {substituted -5, in for x, into first equation}<BR>\n" );
document.write( "y = 25  {added 5 to each side}\r<BR>\n" );
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document.write( "x = -5 and y = 25<BR>\n" );
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