document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=533576>Question 533576</A>: <I><SPAN STYLE=\"word-break: break-all;\"> amy's age = a, her brother's age = b<BR>\n" );
document.write( "Amy is 6 years younger than her brother -> a = b-6. In four years, she will be half as old as her brother -> a+4 = 1/2x(b+4). <BR>\n" );
document.write( "How old is each child? a, b = ? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #351874 by </B><A HREF=/tutors/aboutme.mpl?userid=amalialaila><B>amalialaila(3)</B></A><img src=\"/images/stars/iconNewId_16x16.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=amalialaila><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=351874\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a = b-6 ...(i)<BR>\n" );
document.write( "a+4 = 1/2(b+4) ...(ii)<BR>\n" );
document.write( "substitute equation (i) to (ii)<BR>\n" );
document.write( "(b-6)+4 = 1/2(b+4)<BR>\n" );
document.write( "b-2 = 1/2(b+4)<BR>\n" );
document.write( "2(b-2) = b+4<BR>\n" );
document.write( "2b-4 = b+4<BR>\n" );
document.write( "unify the components with the same variable<BR>\n" );
document.write( "2b-b = 4+4<BR>\n" );
document.write( "b = 8, this is amy's brother age. substitute the number to equation (i)<BR>\n" );
document.write( "a = 8-6<BR>\n" );
document.write( "a = 2<BR>\n" );
document.write( "amy's 2 years old and the brother is 8 years old. </SPAN>\n" );
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