document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=894214>Question 894214</A>: <I><SPAN STYLE=\"word-break: break-all;\"> solve this formula for r. e/d=R+r/r </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #541888 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39617)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=541888\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Solve for r in:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=e%2Fd=R%2Br%2Fr ALIGN=MIDDLE  ALT=\"e%2Fd=R%2Br%2Fr\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Multiply both members by r.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=er%2Fd=Rr%2Br%5E2 ALIGN=MIDDLE  ALT=\"er%2Fd=Rr%2Br%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r%5E2%2BRr-er%2Fd=0 ALIGN=MIDDLE  ALT=\"r%5E2%2BRr-er%2Fd=0\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r%5E2%2B%28R-e%2Fd%29r=0 ALIGN=MIDDLE  ALT=\"r%5E2%2B%28R-e%2Fd%29r=0\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r%28r%2B%28R-e%2Fd%29%29=0 ALIGN=MIDDLE  ALT=\"r%28r%2B%28R-e%2Fd%29%29=0\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Either r=0 which probably not what you want and will not work in the original equation;<BR>\n" );
document.write( "Or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28r=e%2Fd-R%29 ALIGN=MIDDLE  ALT=\"highlight%28r=e%2Fd-R%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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document.write( "QUESTION:<BR>\n" );
document.write( "Why do you show r used in the equation in the expression of <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r%2Fr ALIGN=MIDDLE  ALT=\"r%2Fr\"   DISABLED_style= \"max-width:90%; height:auto;\" >?<BR>\n" );
document.write( "This is simply equal to 1. </SPAN>\n" );
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