document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=469166>Question 469166</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 2 3 4 15 12<BR>\n" );
document.write( "3 4 5 28 20<BR>\n" );
document.write( "4 5 6 X  30<BR>\n" );
document.write( "5 6 7 66 42<BR>\n" );
document.write( "6 7 8 91 56\r<BR>\n" );
document.write( "\n" );
document.write( "Find X </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #321925 by </B><A HREF=/tutors/aboutme.mpl?userid=Tatiana_Stebko><B>Tatiana_Stebko(1539)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Tatiana_Stebko><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=Tatiana_Stebko><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=321925\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> X=45<BR>\n" );
document.write( "From the first line 2 3 4 15 12<BR>\n" );
document.write( "12=3*4<BR>\n" );
document.write( "15=(2*3)*2+3<BR>\n" );
document.write( "From the second line 3 4 5 28 20<BR>\n" );
document.write( "20=4*5<BR>\n" );
document.write( "28=(3*4)*2+4<BR>\n" );
document.write( "From the fourth line 5 6 7 66 42<BR>\n" );
document.write( "42=6*7<BR>\n" );
document.write( "66=(5*6)*2+6<BR>\n" );
document.write( "From the fifth line 6 7 8 91 56<BR>\n" );
document.write( "56=7*8<BR>\n" );
document.write( "91=(6*7)*2+7<BR>\n" );
document.write( "Then from the third line 4 5 6 X  30<BR>\n" );
document.write( "X=(4*5)*2+5=45<BR>\n" );
document.write( "  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );