document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=75601>Question 75601</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve each of the following systems by substitution<BR>\n" );
document.write( "8x -4y = 16<BR>\n" );
document.write( "    y = 2x-4<BR>\n" );
document.write( " <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 #54267 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=54267\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Plug the 2nd equation into y of the 1st equation<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=8x+-4%282x-4%29+=+16 ALIGN=MIDDLE  ALT=\"8x+-4%282x-4%29+=+16\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=8x+-8x%2B16+=+16 ALIGN=MIDDLE  ALT=\"8x+-8x%2B16+=+16\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=16=16 ALIGN=MIDDLE  ALT=\"16=16\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Since this is true for all x, there are an infinite number of solutions. If you solve the 1st equation for y you get:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=8x+-4y+=+16 ALIGN=MIDDLE  ALT=\"8x+-4y+=+16\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-4y=16-8x ALIGN=MIDDLE  ALT=\"-4y=16-8x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=-4%2B2x ALIGN=MIDDLE  ALT=\"y=-4%2B2x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=2x-4 ALIGN=MIDDLE  ALT=\"y=2x-4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Which is the same as the 2nd equation. Since they are the same, they intersect at an infinite number of points. </SPAN>\n" );
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