document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=557408>Question 557408</A>: <I><SPAN STYLE=\"word-break: break-all;\"> When adding two rational expressions with a variable in the denominator do I double the variable  Like 13/33r + 11/9r  I added the numerators and the denominators and came up with 24/42r which simplifies down to 4/7r Now do I make the variable r, r^2 so that the answer is 4/7r^2  Also let me know if I did this problem right?  Thanks </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #362728 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=362728\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=13%2F%2833r%29+%2B+11%2F%289r%29 ALIGN=MIDDLE  ALT=\"13%2F%2833r%29+%2B+11%2F%289r%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "just like in ordinary fractions, you have to have a common denominator to add (or subtract) fractions.<BR>\n" );
document.write( "In this problem the common denominator will be 99r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%283%2813%29%2B11%2811%29%29%2F%2899r%29 ALIGN=MIDDLE  ALT=\"%283%2813%29%2B11%2811%29%29%2F%2899r%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2839%2B121%29%2F%2899r%29 ALIGN=MIDDLE  ALT=\"%2839%2B121%29%2F%2899r%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=160%2F%2899r%29 ALIGN=MIDDLE  ALT=\"160%2F%2899r%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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