document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=151380>Question 151380</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Six years ago bob was four times as old as Mary. In four years he will be twice as old as Mary. How old are they?\r<BR>\n" );
document.write( "\n" );
document.write( "Six years ago<BR>\n" );
document.write( "Bob = 4Mary - 6\r<BR>\n" );
document.write( "\n" );
document.write( "In four years<BR>\n" );
document.write( "Bob = 2Mary + 4\r<BR>\n" );
document.write( "\n" );
document.write( "4M - 6 = 2M + 4<BR>\n" );
document.write( "2M = 10<BR>\n" );
document.write( "Mary = 5 years old\r<BR>\n" );
document.write( "\n" );
document.write( "Substitute both equations with 5, and Bob is 14\r<BR>\n" );
document.write( "\n" );
document.write( "I just want to know if that is right or wrong? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #111271 by </B><A HREF=/tutors/aboutme.mpl?userid=oscargut><B>oscargut(2103)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=oscargut><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=oscargut><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=111271\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Six years ago bob was four times as old as Mary. In four years he will be twice as old as Mary. How old are they?\r<BR>\n" );
document.write( "\n" );
document.write( "B= Bob's age now<BR>\n" );
document.write( "M= Mary's age now\r<BR>\n" );
document.write( "\n" );
document.write( "You did it wrong you have to start like this:\r<BR>\n" );
document.write( "\n" );
document.write( "B-6=4(M-6)<BR>\n" );
document.write( "B+4=2(M+4)\r<BR>\n" );
document.write( "\n" );
document.write( "solving we have\r<BR>\n" );
document.write( "\n" );
document.write( "B=26 and M=11 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );