document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=987137>Question 987137</A>: <I><SPAN STYLE=\"word-break: break-all;\"> y=x^2&#8722;10<BR>\n" );
document.write( "9x^2&#8722;y^2=90\r<BR>\n" );
document.write( "\n" );
document.write( "solve the system by the substitution method  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #607916 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=607916\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> y=x^2 - 10<BR>\n" );
document.write( "9x^2 - y^2=90\r<BR>\n" );
document.write( "\n" );
document.write( "solve the system by the substitution method <BR>\n" );
document.write( "--------------<BR>\n" );
document.write( "y=x^2 - 10 --> x^2 = y + 10<BR>\n" );
document.write( "Sub for x^2 in the 2nd eqn.<BR>\n" );
document.write( "9(y + 10) - y^2 = 90<BR>\n" );
document.write( "9y - y^2 = 0<BR>\n" );
document.write( "y = 0<BR>\n" );
document.write( "y = 9<BR>\n" );
document.write( "------<BR>\n" );
document.write( "Sub for y in any eqn to find x.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );