document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1132992>Question 1132992</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If the average of x,y,z,and 90 is 20 less than the average of y,z,w,and 100, what is the value of w - x? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #750154 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13200)</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=750154\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "The average of x, y, z, and 90 is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x%2By%2Bz%2B90%29%2F4 ALIGN=MIDDLE  ALT=\"%28x%2By%2Bz%2B90%29%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<br><BR>\n" );
document.write( "The average of y, z, w, and 100 is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28y%2Bz%2Bw%2B100%29%2F4 ALIGN=MIDDLE  ALT=\"%28y%2Bz%2Bw%2B100%29%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<br><BR>\n" );
document.write( "The problem tells us that the first average is 20 less than the second average:<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x%2By%2Bz%2B90%29%2F4+=+%28y%2Bz%2Bw%2B100%29%2F4+-+20 ALIGN=MIDDLE  ALT=\"%28x%2By%2Bz%2B90%29%2F4+=+%28y%2Bz%2Bw%2B100%29%2F4+-+20\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2By%2Bz%2B90+=+y%2Bz%2Bw%2B100+-+80 ALIGN=MIDDLE  ALT=\"x%2By%2Bz%2B90+=+y%2Bz%2Bw%2B100+-+80\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "Combine terms where possible and  cancel terms that are identical on both sides of the equation and see if you can see how to get the answer from there.<br><BR>\n" );
document.write( "----------------------------------------------------<BR>\n" );
document.write( "Note: the solution by tutor @josgarithmetic contains errors and shows the wrong answer....<br><BR>\n" );
document.write( "Can you see the two errors in that solution? </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );