document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1084821>Question 1084821</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A rectangular portrait measures 50 cm by 70 cm. It is surrounded by a rectangular frame of uniform width. If the area of the frame is the same as the area of the portrait, what is the approximate width of the frame?\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #698875 by </B><A HREF=/tutors/aboutme.mpl?userid=chen><B>chen(11)</B></A><img src=\"/images/stars/stars-06.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=chen><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=698875\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The area of the portrait is 50x70 = 3500 square cm<BR>\n" );
document.write( "Let's call w the width of the frame.<BR>\n" );
document.write( "Its area is 2*(70+2*w)*w+2*50*w = <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=140%2B4%2Aw%5E2%2B100%2Aw=3500 ALIGN=MIDDLE  ALT=\"140%2B4%2Aw%5E2%2B100%2Aw=3500\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( " then dividing by 4:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=w%5E2%2B25%2Aw-840=0 ALIGN=MIDDLE  ALT=\"w%5E2%2B25%2Aw-840=0\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "By solving the equation we get w = around 19cm\r<BR>\n" );
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