document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1109642>Question 1109642</A>: <I><SPAN STYLE=\"word-break: break-all;\"> John is 10 years younger than two times Mary. Mary’s age is to her mother’s age as John’s age is to his father’s age. Mary’s mom is 36 and John’s father is 40. How old is John?<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #724626 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=724626\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  John is 10 years younger than two times Mary. Mary’s age is to her mother’s age as John’s age is to his father’s age. Mary’s mom is 36 and John’s father is 40. How old is John?<BR>\n" );
document.write( "------<BR>\n" );
document.write( "J = 2M-10<BR>\n" );
document.write( "M/m = J/f<BR>\n" );
document.write( "m = 36 ; f = 40<BR>\n" );
document.write( "-------------<BR>\n" );
document.write( "J = 2M-10<BR>\n" );
document.write( "M/36 = J/40<BR>\n" );
document.write( "------<BR>\n" );
document.write( "J = 2M-10<BR>\n" );
document.write( "J = (40/36)M<BR>\n" );
document.write( "-----<BR>\n" );
document.write( "2M-10 = (10/9)M<BR>\n" );
document.write( "(1 1/9)M = 10<BR>\n" );
document.write( "(10/9)M = 10<BR>\n" );
document.write( "Mary = 9 years<BR>\n" );
document.write( "J = 2M-10 = 8 years<BR>\n" );
document.write( "-------------<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "------------- </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );