document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=912465>Question 912465</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Sana is twice as old as her youngest brother. If the difference between their ages  is 15 years. How old is her youngest brother? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #554405 by </B><A HREF=/tutors/aboutme.mpl?userid=battyb><B>battyb(1)</B></A><img src=\"/images/stars/iconNewId_16x16.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=battyb><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=554405\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Sana is twice as old as her youngest brother:<br/>\r<BR>\n" );
document.write( "\n" );
document.write( "s = 2b<br/>\r<BR>\n" );
document.write( "\n" );
document.write( "If the difference between their ages  is 15 years:<br/><BR>\n" );
document.write( "s = b + 15<br/>\r<BR>\n" );
document.write( "\n" );
document.write( "Since we know the value of s is equal to 2b, we can substitute:<br/>\r<BR>\n" );
document.write( "\n" );
document.write( "2b = b + 15<br/><BR>\n" );
document.write( "Then subtract b from each side:<BR>\n" );
document.write( "2b = b + 15<BR>\n" );
document.write( "-b&nbsp&nbsp&nbsp-b<br/>\r<BR>\n" );
document.write( "\n" );
document.write( "b = 15<br/>\r<BR>\n" );
document.write( "\n" );
document.write( "Therefore, the age of the little brother is 15 years.<BR>\n" );
document.write( "And the age of Sana is 30. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );