document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=189098>Question 189098</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Mr. Kim is 25 years older than his daughter.  In ten years Mr. Kim will be twice as old as his daughter will be.  How old is each now?  I know that Mr. Kim is 40 years old and the daughter is 15, but I do not know how to show my work.  I do not know how to find the equation. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #141847 by </B><A HREF=/tutors/aboutme.mpl?userid=Earlsdon><B>Earlsdon(6294)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Earlsdon><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=141847\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let K = Mr Kim's present age and D = his daughter's present age.<BR>\n" );
document.write( "From the problem you can write:<BR>\n" );
document.write( "1) K = D+25 \"Mr Kim is 25 years older than his daughter\"<BR>\n" );
document.write( "2) K+10 = 2(D+10) \"In 10 year, Mr Kim will be twice as old as his daughter will be.\"<BR>\n" );
document.write( "Substitute the K from equation 1) into equation 2) and solve for D.<BR>\n" );
document.write( "2b) (D+25)+10 = 2(D+10) Simplify.<BR>\n" );
document.write( "2c) D+35 = 2D+20 Subtract D from both sides.<BR>\n" );
document.write( "2d) 35 = D+20 Finally, subtract 20 from both sides.<BR>\n" );
document.write( "2c) 15 = D or D = 15<BR>\n" );
document.write( "Mr Kim's daughter's age is 15 years.<BR>\n" );
document.write( "Mr Kim's age is D+25<BR>\n" );
document.write( "15+25 = 40 years. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );