document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=97981>Question 97981</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A course at a local college has four exams.  The first three each count for 20% of the final grade and the final exam counts for the remaining 40%.  A student scored 68,78, and 88 out of 100 on the first three exams.  What score(out of 100)does this student have to score on the final to ensure a cumulative grade 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 #71277 by </B><A HREF=/tutors/aboutme.mpl?userid=edjones><B>edjones(8007)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=edjones><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=edjones><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=71277\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let x=grade he has to get on the final.<BR>\n" );
document.write( "68*.2+78*.2+88*.2+.4x=80<BR>\n" );
document.write( "13.6+15.6+17.6+.4x=80<BR>\n" );
document.write( "46.8+.4x=80<BR>\n" );
document.write( ".4x=33.2<BR>\n" );
document.write( "x=33.2/.4=83<BR>\n" );
document.write( "Check:<BR>\n" );
document.write( "46.8+83*.4=46.8+33.2=80<BR>\n" );
document.write( "Ed  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );