document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=194740>Question 194740</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/039577120X/algebrahomeworkh>Geometry</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> a+c/b+d=a-c/b-d and a/b=c/d\r<BR>\n" );
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document.write( "Show that the given proportions are equivalent... </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #146099 by </B><A HREF=/tutors/aboutme.mpl?userid=RAY100><B>RAY100(1637)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=RAY100><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=146099\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (a+c)/(b+d) = (a-c) / (b-d)<BR>\n" );
document.write( "cross  multiply<BR>\n" );
document.write( "ab -ad +bc -cd  = ab +ad -bc -cd<BR>\n" );
document.write( "cancelling  ab  and  -cd,  on  both  sides  of  eqn<BR>\n" );
document.write( "combining  like  terms<BR>\n" );
document.write( "-2ad = -2bc<BR>\n" );
document.write( "dividing  both  sides  by (-2)<BR>\n" );
document.write( "ad =bc<BR>\n" );
document.write( "dividing  both  sides  by (bd)<BR>\n" );
document.write( "a/b = c/d,,,,,,,,,as  required </SPAN>\n" );
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