document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=398950>Question 398950</A>: <I><SPAN STYLE=\"word-break: break-all;\"> tina is twice as old as her cousin sally. the sum of their ages is 21 years. How old is each girls? Explain. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #282582 by </B><A HREF=/tutors/aboutme.mpl?userid=teishad><B>teishad(7)</B></A><img src=\"/images/stars/stars-05.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=teishad><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=teishad><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=282582\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Tina is going to be represented by T<BR>\n" );
document.write( "Sally is going to be represented by S\r<BR>\n" );
document.write( "\n" );
document.write( "T=2S<BR>\n" );
document.write( "because tina is twice as old as sally<BR>\n" );
document.write( "T+s=21<BR>\n" );
document.write( "because the sum of their ages is 21<BR>\n" );
document.write( "plug in the first equation to the second.<BR>\n" );
document.write( "2s+s=21<BR>\n" );
document.write( "3s=21<BR>\n" );
document.write( "divide by 3<BR>\n" );
document.write( "s=7<BR>\n" );
document.write( "then plug in s=7 to the first equation<BR>\n" );
document.write( "2s=t<BR>\n" );
document.write( "2*7=14<BR>\n" );
document.write( "sally is 7 and tina is 14, </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );