document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1137213>Question 1137213</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi<BR>\n" );
document.write( "the members of a club each contribute an equal amount to buy a computer.  If there were 3 more members each member would have contributed 10 dollars less. If there were 2 fewer members each would have contributed 10 dollars more.\r<BR>\n" );
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document.write( "how many members were in the club.\r<BR>\n" );
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document.write( "thanks </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #755059 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13203)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=755059\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "Let the number of members be x, and the amount they each contribute be y.  Then<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x%2B3%29%28y-10%29+=+xy ALIGN=MIDDLE  ALT=\"%28x%2B3%29%28y-10%29+=+xy\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=xy-10x%2B3y-30+=+xy ALIGN=MIDDLE  ALT=\"xy-10x%2B3y-30+=+xy\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-10x%2B3y+=+30 ALIGN=MIDDLE  ALT=\"-10x%2B3y+=+30\"   DISABLED_style= \"max-width:90%; height:auto;\" >  (1)<br><BR>\n" );
document.write( "and<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x-2%29%28y%2B10%29+=+xy ALIGN=MIDDLE  ALT=\"%28x-2%29%28y%2B10%29+=+xy\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=xy%2B10x-2y-20+=+xy ALIGN=MIDDLE  ALT=\"xy%2B10x-2y-20+=+xy\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10x-2y+=+20 ALIGN=MIDDLE  ALT=\"10x-2y+=+20\"   DISABLED_style= \"max-width:90%; height:auto;\" >  (2)<br><BR>\n" );
document.write( "Adding (1) and (2) eliminates x and gives us the value of y:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+50 ALIGN=MIDDLE  ALT=\"y+=+50\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "Then substituting y=50 in either (1) or (2) gives us x=12.<br><BR>\n" );
document.write( "ANSWER:  The number of members in the club is x = 12.<br><BR>\n" );
document.write( "CHECK:<BR>\n" );
document.write( "xy = 12(50) = 600<BR>\n" );
document.write( "(x+3)(y-10) = 15(40) = 600<BR>\n" );
document.write( "(x-2)(x+10) = 10(60) = 600<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );