document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=37158>Question 37158</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve each of 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 #22868 by </B><A HREF=/tutors/aboutme.mpl?userid=fractalier><B>fractalier(6550)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=fractalier><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=fractalier><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=22868\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> We take the value for y in the second equation\r<BR>\n" );
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document.write( "y = 2x – 4   and plug it in to the first equation\r<BR>\n" );
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document.write( "8x – 4y = 16   to get\r<BR>\n" );
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document.write( "8x - 4(2x – 4) = 16.  Simplifying, we get\r<BR>\n" );
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document.write( "8x - 8x + 16 = 16  and 16 = 16.  Since this is always true, for any value of x, we know that this is a dependent system with an infinite number of solutions. </SPAN>\n" );
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