document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=417043>Question 417043</A>: <I><SPAN STYLE=\"word-break: break-all;\"> if you have 78 90 68 and 83 what do you need to get an average of 80 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #292066 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley79><B>checkley79(3341)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley79><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=292066\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I'll assume you mean by one additional test score.<BR>\n" );
document.write( "(78+90+68+83+x)/5=80<BR>\n" );
document.write( "(319+x)/5=80 cross multiply<BR>\n" );
document.write( "319+x=80*5<BR>\n" );
document.write( "319+x=400<BR>\n" );
document.write( "x=400-319<BR>\n" );
document.write( "x=81 ans. for the test score to maintain an 80 average.<BR>\n" );
document.write( "Proof:<BR>\n" );
document.write( "(78+90+68+83+81)/5=80<BR>\n" );
document.write( "400/5=80<BR>\n" );
document.write( "400=400<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );