document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=479364>Question 479364</A>: <I><SPAN STYLE=\"word-break: break-all;\"> On a school test, The average score for the girls in the class is 91, and the average score for the boys in the class is 85. If the average score for the class is 89, what fraction of the class are boys?\r<BR>\n" );
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document.write( "I should resolve it by a system... <BR>\n" );
document.write( "91x + 85y= 89 (x+y)<BR>\n" );
document.write( "But then??\r<BR>\n" );
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document.write( "Thanks in advance. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #328465 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=328465\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (91x+85y)/(x+y)=89<BR>\n" );
document.write( "91x + 85y= 89 (x+y)<BR>\n" );
document.write( "...=89x+89y<BR>\n" );
document.write( "2x=4y<BR>\n" );
document.write( "y=x/2<BR>\n" );
document.write( "1/3 of the class are boys.<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Ed </SPAN>\n" );
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