document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=471026>Question 471026</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A student having marks of 65 and 75 wishes to raise the average of the two marks and a test mark to 80. What must he receive on the test? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #323092 by </B><A HREF=/tutors/aboutme.mpl?userid=algebrahouse.com><B>algebrahouse.com(1659)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=algebrahouse.com><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=algebrahouse.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=323092\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Add the two given scores with the missing score, divide by 3, and that is the average.  Assuming, everything is weighted the same.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "65 + 75 + x<BR>\n" );
document.write( "------------ = 80 <BR>\n" );
document.write( "3\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "140 + x<BR>\n" );
document.write( "------- = 80 {combined like terms in numerator}<BR>\n" );
document.write( "3\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "140 + x = 240 {multiplied both sides by 3}<BR>\n" );
document.write( "x = 100 {subtracted 140 from both sides}\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "He must receive 100% on the test.<BR>\n" );
document.write( "<br>For more help from me, visit: <a  rel=nofollow HREF= \"http://www.algebrahouse.com/\" target = \"_blank\">www.algebrahouse.com</a><br><br><br> </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );