document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=185872>Question 185872</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Mary, who is sixteen years old, is four times as old as her brother. How old will Mary be when she is twice as old as her brother? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #139450 by </B><A HREF=/tutors/aboutme.mpl?userid=feliz1965><B>feliz1965(151)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=feliz1965><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=139450\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Mary, who is sixteen years old, is four times as old as her brother. How old will Mary be when she is twice as old as her brother?\r<BR>\n" );
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document.write( "If Mary is 16 and this is 4 times as old as her brother, then we can say that her brother is 4 years old.\r<BR>\n" );
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document.write( "Let M = Mary's age when she is 2x as old as her brother.\r<BR>\n" );
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document.write( "16/M = 4/8\r<BR>\n" );
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document.write( "4M = 128\r<BR>\n" );
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document.write( "M = 128/4\r<BR>\n" );
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document.write( "M = 32\r<BR>\n" );
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