document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=234331>Question 234331</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a boy is twice as old as his brother , 4 year a ago he was 3 times as old as his brother. find thier present ages </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #172798 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley77><B>checkley77(12844)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley77><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=172798\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> boy=2x age now <BR>\n" );
document.write( "brother=x age now<BR>\n" );
document.write( "2x-4=3(x-4)<BR>\n" );
document.write( "2x-4=3x-12<BR>\n" );
document.write( "2x-3x=-12+4<BR>\n" );
document.write( "-x=-8<BR>\n" );
document.write( "x=8 is the age of the brother now.<BR>\n" );
document.write( "boy=2*8=16 the age of the boy now.<BR>\n" );
document.write( "Proof:<BR>\n" );
document.write( "2*8-4=3(8-4)<BR>\n" );
document.write( "16-4=3*4<BR>\n" );
document.write( "12=12 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );