document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=65458>Question 65458</A>: <I><SPAN STYLE=\"word-break: break-all;\"> solve: \r<BR>\n" );
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document.write( "x^2-y^2=4<BR>\n" );
document.write( "x+y=1<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 #45977 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=45977\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1st: x^2-y^2=4<BR>\n" );
document.write( "2nd: x+y=1<BR>\n" );
document.write( "Divide 1st by 2nd to get:<BR>\n" );
document.write( "3rd: x-y=4<BR>\n" );
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document.write( "Add 2nd and 3rd to get:<BR>\n" );
document.write( "4th: 2x=5<BR>\n" );
document.write( "x=5/2<BR>\n" );
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document.write( "Substitute into 2nd to get:<BR>\n" );
document.write( "(5/2)+y=1<BR>\n" );
document.write( "y=-3/2<BR>\n" );
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document.write( "Solution: x=5/2 ; y=-3/2<BR>\n" );
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document.write( "Checking the solution:<BR>\n" );
document.write( "1st: x^2-y^2=4<BR>\n" );
document.write( "(5/2)^2-(-3/2)^2=4<BR>\n" );
document.write( "25/4 - 9/4 = 4<BR>\n" );
document.write( "16/4 = 4<BR>\n" );
document.write( "4=4<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.\r<BR>\n" );
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