document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=827740>Question 827740</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A science class has two times as many boys as girls. During the final examination of the year, the girls average 90 points each, and the class as a whole averages 80 points per person. What is the average score of the boys in the class? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #498862 by </B><A HREF=/tutors/aboutme.mpl?userid=LinnW><B>LinnW(1048)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=LinnW><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=LinnW><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=498862\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> n = total students<BR>\n" );
document.write( "b = no of boys<BR>\n" );
document.write( "g = no of girls<BR>\n" );
document.write( "s = boys average score\r<BR>\n" );
document.write( "\n" );
document.write( "b + g = n<BR>\n" );
document.write( "Since two times as many boys<BR>\n" );
document.write( "2g + g = n<BR>\n" );
document.write( "3g = n\r<BR>\n" );
document.write( "\n" );
document.write( "80n = 90g + s*b<BR>\n" );
document.write( "Substitute 3g for n and 2g for b<BR>\n" );
document.write( "80(3g) = 90g + s(2g)<BR>\n" );
document.write( "240g = 90g + (2s)g<BR>\n" );
document.write( "240g = (90 + 2s)g<BR>\n" );
document.write( "divide each side by g<BR>\n" );
document.write( "240 = 90 + 2s<BR>\n" );
document.write( "subtract 90 from each side<BR>\n" );
document.write( "150 = 2s<BR>\n" );
document.write( "divide each side by 2<BR>\n" );
document.write( "75 = s<BR>\n" );
document.write( "The average boy score is 75<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );