document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=587348>Question 587348</A>: <I><SPAN STYLE=\"word-break: break-all;\"> sophie's average mark on 3 tests was 80.the mark on the first test was 76. her average for the first two tests was 18 more than the mark on the third test. what marks did she get on the second and third tests? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #374111 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=374111\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> sophie's average mark on 3 tests was 80.the mark on the first test was 76. her average for the first two tests was 18 more than the mark on the third test. what marks did she get on the second and third tests?<BR>\n" );
document.write( "**<BR>\n" );
document.write( "let x=mark of 2nd test<BR>\n" );
document.write( "(76+x)/2+18=mark of 3rd test<BR>\n" );
document.write( "..<BR>\n" );
document.write( "[76+x+(76+x)/2+18]/3=80 (average mark on 3 tests)<BR>\n" );
document.write( "multiply top and bottom of left side by 2<BR>\n" );
document.write( "(152+2x+76+x+36)/6=80<BR>\n" );
document.write( "264+3x=480<BR>\n" );
document.write( "3x=216<BR>\n" );
document.write( "x=72<BR>\n" );
document.write( "(76+x)/2+18=92<BR>\n" );
document.write( "ans:<BR>\n" );
document.write( "mark of 2nd test=72<BR>\n" );
document.write( "mark of 3rd test=92<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );