document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=936779>Question 936779</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Ruby is 5 years older than Paula. She is also 7 years older than Shelly. The sum of their ages is 21. How old is each person? Justify your answer. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #570263 by </B><A HREF=/tutors/aboutme.mpl?userid=428225><B>428225(90)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=428225><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=428225><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=570263\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let x be the unknown age of Shelly<BR>\n" );
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document.write( "x+x+2+x+7=21<BR>\n" );
document.write( "3x+9=21(subtract 9)<BR>\n" );
document.write( "3x=12 (divide by 3)<BR>\n" );
document.write( "x=4<BR>\n" );
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document.write( "Therefore Shelly is 4 years old. <BR>\n" );
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document.write( "Since Shelly is 7 years younger than Ruby and Paula is only 5 years younger than Ruby; Paula is 2 years older than Shelly.<BR>\n" );
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document.write( "Therefore Paula is 6<BR>\n" );
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document.write( "Since Ruby is 7 years older than Shelly, Ruby must be 11. </SPAN>\n" );
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