document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=750646>Question 750646</A>: <I><SPAN STYLE=\"word-break: break-all;\"> When Matthew is 12 years old his mother is 3 times as old. How many years must pass before his mother is twice as old? How many years ago was she 7 times as old? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #456746 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=456746\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> When Matthew is 12 years old his mother is 3 times as old.<BR>\n" );
document.write( "Matt = 12, Mother = 36<BR>\n" );
document.write( ":<BR>\n" );
document.write( " How many years must pass before his mother is twice as old?<BR>\n" );
document.write( "let y = no. of years for this to be true<BR>\n" );
document.write( "y + 36 = 2(y+12)<BR>\n" );
document.write( "y + 36 = 2y + 24<BR>\n" );
document.write( "36 - 24 = 2y - y<BR>\n" );
document.write( "12 = y<BR>\n" );
document.write( "This will be true in 12 yrs (Mom will be 48, Matt will be 24)<BR>\n" );
document.write( ":<BR>\n" );
document.write( " How many years ago was she 7 times as old?<BR>\n" );
document.write( "let z = no. of yrs for this to be true<BR>\n" );
document.write( "36-z = 7(12-z)<BR>\n" );
document.write( "36 - z = 84 - 7z<BR>\n" );
document.write( "-z + 7z = 84 - 36<BR>\n" );
document.write( "6z = 48<BR>\n" );
document.write( "z = 8 yrs for this to be true. (Mom will be 28, Matt will be 4) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );