document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=691839>Question 691839</A>: <I><SPAN STYLE=\"word-break: break-all;\"> ahmed is 7 years older than his sister if the sun of their ages is 21 years find their ages </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #426872 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=426872\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> ahmed is 7 years older than his sister if the sun of their ages is 21 years find their ages<BR>\n" );
document.write( "------<BR>\n" );
document.write( "Equations:<BR>\n" );
document.write( "a = s + 7<BR>\n" );
document.write( "a + s = 21<BR>\n" );
document.write( "----<BR>\n" );
document.write( "Substitute for \"a\" and solve for \"s\":<BR>\n" );
document.write( "s+7 + s = 21<BR>\n" );
document.write( "2s = 14<BR>\n" );
document.write( "s = 7 (sister's age now)<BR>\n" );
document.write( "----------------------<BR>\n" );
document.write( "Solve for \"a\"<BR>\n" );
document.write( "a = s + 7<BR>\n" );
document.write( "a = 7+7<BR>\n" );
document.write( "a = 14 yrs (ahmed's) age now<BR>\n" );
document.write( "================================<BR>\n" );
document.write( "cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "================ </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );