document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=295232>Question 295232</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 5 years ago, bob was 2/3 mary's age.  In 10 years, he will be 5/6 her age.  How old is bob now?<BR>\n" );
document.write( "a. 10  b. 15 c. 20  d. 21\r<BR>\n" );
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document.write( "How is this set up and how is it solved? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #212803 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=212803\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I'll give you the basics and let's see how you do.<BR>\n" );
document.write( "Bob is age b now<BR>\n" );
document.write( "Mary is age m now<BR>\n" );
document.write( "5 years ago Bob was b-5 and Mary was m-5<BR>\n" );
document.write( "In ten years Bob will be b+10 and Mary will be m+10<BR>\n" );
document.write( "The biggest mistake that students make is forgetting to keep the ages balanced by adding or subtracting the same number form both.<BR>\n" );
document.write( "I'll set up the first equation<BR>\n" );
document.write( "5 years ago, bob was 2/3 mary's age<BR>\n" );
document.write( "(b-5)=2/3*(m-5)<BR>\n" );
document.write( "Now you set up the second equation.<BR>\n" );
document.write( "In 10 years, he will be 5/6 her age\r<BR>\n" );
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document.write( "(b-5)=2/3*(m-5)\r<BR>\n" );
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document.write( "When you write the other equation, remember, they are asking for bob's age not mary's so solve for b<BR>\n" );
document.write( "bob will be the younger because he is 2/3 of her age at one point and later 5/6 of her age.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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