document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=992167>Question 992167</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me out with this maths.<BR>\n" );
document.write( "The sum of the digits of a two-digit number is 12. The tens digit is the square of its units digit. Find the number. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #611778 by </B><A HREF=/tutors/aboutme.mpl?userid=rothauserc><B>rothauserc(4718)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rothauserc><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=rothauserc><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=611778\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x + y = 12, where x is the tens digit and y is the units digit<BR>\n" );
document.write( "x = y^2<BR>\n" );
document.write( "substitute for x in first equation<BR>\n" );
document.write( "y^2 + y - 12 = 0<BR>\n" );
document.write( "factor the equation<BR>\n" );
document.write( "(y-3)*(y+4) = 0<BR>\n" );
document.write( "y = 3 or y = -4<BR>\n" );
document.write( "x = 9 or x = 16<BR>\n" );
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document.write( "we have one solution since we are looking for a two digit number<BR>\n" );
document.write( "93 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );