document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=201804>Question 201804</A>: <I><SPAN STYLE=\"word-break: break-all;\"> the father's age 10 years ago was 35 years more than twice his son's age. After how many years from now will the father be<BR>\n" );
document.write( "(i) twice his son's age?<BR>\n" );
document.write( "(ii) thrice his son'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 #152128 by </B><A HREF=/tutors/aboutme.mpl?userid=RAY100><B>RAY100(1637)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=RAY100><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=152128\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let  f = father's age 10  yrs  ago,  and s= son's age  10  yrs  ago<BR>\n" );
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document.write( "f = 2s +35,,,,,we  can  continue  to  use  variable  symbols,  but  it  is  much  clearer to  use  arbitrary  numbers.\r<BR>\n" );
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document.write( "Assume  son  is  10 at  this point,,f= 2(10) +35 =55,,,all  10  yrs  ago<BR>\n" );
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document.write( "Adding  10  to  both,  today  they  are  f=65,,,s=20<BR>\n" );
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document.write( "father  will  be  double  if,,, (65+x) = 2(20+x)<BR>\n" );
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document.write( "65+x = 40 +2x<BR>\n" );
document.write( "25 = x,,,,,,,,,that  is  25  yrs  hence, father  is  twice  age  of  son<BR>\n" );
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document.write( "checking  f= 65 + 25 =90,,,,,son  = 20 +25 =45,,,90/45=2,,,ok<BR>\n" );
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document.write( "father  will  be  tripled  if ,,,(65+y) = 3 (20 +y)<BR>\n" );
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document.write( "65+y =60 +3y<BR>\n" );
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document.write( "5= 2y<BR>\n" );
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document.write( "2.5 = y,,,,or  2.5  yrs  hence  father  will  be  triple  sons  age<BR>\n" );
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document.write( "checking  65 + 2.5 =67.5,,,20+2.5 =22.5,,,,67.5/22.5 =3,,,,ok </SPAN>\n" );
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