document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=832902>Question 832902</A>: <I><SPAN STYLE=\"word-break: break-all;\"> the average of 3 numbers is 27. If a 4th number is added the new average is 22. What number was added? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #502228 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=502228\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the average of 3 numbers is 27. If a 4th number is added the new average is 22. What number was added?<BR>\n" );
document.write( "-------<BR>\n" );
document.write( "Equations:<BR>\n" );
document.write( "(a+b+c)/3 = 27<BR>\n" );
document.write( "-----------<BR>\n" );
document.write( "(a + b + c + x)/4 = 22<BR>\n" );
document.write( "===============================<BR>\n" );
document.write( "From the 1st equation, a+b+c = 3*27 = 81<BR>\n" );
document.write( "=======<BR>\n" );
document.write( "Substitute into the 2nd equation and solve for \"x\":<BR>\n" );
document.write( "(81+x)/4 = 22<BR>\n" );
document.write( "-----<BR>\n" );
document.write( "81+x = 88<BR>\n" );
document.write( "------<BR>\n" );
document.write( "x = 7<BR>\n" );
document.write( "=================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "------------------- </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );