document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=978100>Question 978100</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Here's the question and part of the solution.\r<BR>\n" );
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document.write( "How many ordered pairs (x,y) satisfy this system of equations:<BR>\n" );
document.write( "x = 2y + 5<BR>\n" );
document.write( "y = (2x-3)(x+9)\r<BR>\n" );
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document.write( "Here's part of the solution:<BR>\n" );
document.write( "Step 1. Substitute y in the 2nd equation into the first equation to get x = 2((2x-3)(x+9)) + 5\r<BR>\n" );
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document.write( "Step 2. The above = 4x^2 + 30x - 54\r<BR>\n" );
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document.write( "Step 3. The solution says this can be rewritten as: 4x^2 + 29x -54 = 0. \r<BR>\n" );
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document.write( "Here are my problems: What happened to the 5 on the end of the equation in Step 1? Where did the 29 come from in Step 3? \r<BR>\n" );
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document.write( "Thank you for any help?\r<BR>\n" );
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document.write( "Helen </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #599600 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39617)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=599600\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=%282%282y%2B5%29-3%29%28%282y%2B5%29%2B9%29 ALIGN=MIDDLE  ALT=\"y=%282%282y%2B5%29-3%29%28%282y%2B5%29%2B9%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, the substitution for x.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=%284y%2B10%2B5%29%282y%2B5%2B9%29 ALIGN=MIDDLE  ALT=\"y=%284y%2B10%2B5%29%282y%2B5%2B9%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=%284y%2B15%29%282y%2B14%29 ALIGN=MIDDLE  ALT=\"y=%284y%2B15%29%282y%2B14%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=8y%5E2%2B30y%2B4%2A14y%2B15%2A14 ALIGN=MIDDLE  ALT=\"y=8y%5E2%2B30y%2B4%2A14y%2B15%2A14\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=8y%5E2%2B86y%2B210 ALIGN=MIDDLE  ALT=\"y=8y%5E2%2B86y%2B210\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0=8y%5E2%2B85y%2B210 ALIGN=MIDDLE  ALT=\"0=8y%5E2%2B85y%2B210\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Find the solutions for y, which might be none, or one, or two of them.\r<BR>\n" );
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document.write( "I CHOSE to make the substitution for x instead of for y.  You could just as well make the sub for y as you may have wanted.  My view is that the subst for x is easier to use.\r<BR>\n" );
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document.write( "What you actually tried to do is tougher, and may be more work. </SPAN>\n" );
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