document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1199605>Question 1199605</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The sun of Anna's age and Ben's age is 40.Two years ago, Anna was thrice as Ben. Find the Anna's age </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #833543 by </B><A HREF=/tutors/aboutme.mpl?userid=math_tutor2020><B>math_tutor2020(3817)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=math_tutor2020><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=833543\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <font color=black size=3><BR>\n" );
document.write( "A = Anna's current age<BR>\n" );
document.write( "B = Ben's current age\r<BR>\n" );
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document.write( "The sum of these current ages is 40.<BR>\n" );
document.write( "A+B = 40<BR>\n" );
document.write( "Pick A or B to isolate. I'll solve for B.<BR>\n" );
document.write( "B = 40-A\r<BR>\n" );
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document.write( "A-2 = Anna's age two years ago<BR>\n" );
document.write( "B-2 = Ben's age  two years ago\r<BR>\n" );
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document.write( "Two years ago, Anna was thrice as Ben.<BR>\n" );
document.write( "A-2 = 3(B-2)\r<BR>\n" );
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document.write( "Apply substitution and solve for \"A\".<BR>\n" );
document.write( "A-2 = 3(B-2)<BR>\n" );
document.write( "A-2 = 3(40-A-2) ...... replace B with 40-A<BR>\n" );
document.write( "A-2 = 3(38-A)<BR>\n" );
document.write( "A-2 = 114-3A<BR>\n" );
document.write( "A+3A = 114+2<BR>\n" );
document.write( "4A = 116<BR>\n" );
document.write( "A = 116/4<BR>\n" );
document.write( "A = 29<BR>\n" );
document.write( "Anna is currently 29 years old.\r<BR>\n" );
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document.write( "B = 40-A<BR>\n" );
document.write( "B = 40-29<BR>\n" );
document.write( "B = 11<BR>\n" );
document.write( "Ben is currently 11 years old.\r<BR>\n" );
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document.write( "Rewind the clock 2 years.<BR>\n" );
document.write( "Anna was 29-2 = 27 years old.<BR>\n" );
document.write( "Ben was 11-2 = 9 years old.<BR>\n" );
document.write( "We see that Anna's past age is exactly triple that of Ben's past age (3*9 = 27).<BR>\n" );
document.write( "The answer is confirmed.\r<BR>\n" );
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document.write( "Answer: Anna's current age is <font color=red>29 years old</font><BR>\n" );
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