document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=71013>Question 71013</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve the following systems by substitution.\r<BR>\n" );
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document.write( "8x - 4y = 16<BR>\n" );
document.write( "      y = 2x - 4 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #50855 by </B><A HREF=/tutors/aboutme.mpl?userid=ptaylor><B>ptaylor(2198)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ptaylor><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=ptaylor><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=50855\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "OK.  From Eq 2, y=2x-4. So, lets substitute 2x-4 for y in Eq 1:\r<BR>\n" );
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document.write( "8x-4(2x-4)=16  get rid of parens\r<BR>\n" );
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document.write( "8x-8x+16=16  subtract 16 from both sides:\r<BR>\n" );
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document.write( "0=0\r<BR>\n" );
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document.write( "NO SOLUTION EXISTS.  WHY???????????  Eq 1 and Eq 2 are identical equations\r<BR>\n" );
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document.write( "First, we'll multiply Eq 2 by 4 and we get:\r<BR>\n" );
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document.write( "4y=8x-16 rearrange this equation by subtracting 4y and adding 16 to both sides\r<BR>\n" );
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document.write( "8x-4y=16-------------SAME AS EQ 1\r<BR>\n" );
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document.write( "Hope this helps---ptaylor\r<BR>\n" );
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document.write( " </SPAN>\n" );
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