document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=880709>Question 880709</A>: <I><SPAN STYLE=\"word-break: break-all;\"> When Katy was 12, her father was three times her age. Now he is twice her age. <BR>\n" );
document.write( "How old is Katy now?\r<BR>\n" );
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document.write( "my guess:<BR>\n" );
document.write( "let x= katy<BR>\n" );
document.write( "father=3x </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #531636 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=531636\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> \"When Katy was 12, her father was three times her age\"\r<BR>\n" );
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document.write( "So her dad was 12*3 = 36 years old when she was 12.\r<BR>\n" );
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document.write( "Katy = 12 yrs old<BR>\n" );
document.write( "Dad = 36 yrs old\r<BR>\n" );
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document.write( "Add on x years\r<BR>\n" );
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document.write( "Katy = (12+x) yrs old<BR>\n" );
document.write( "Dad = (36+x) yrs old\r<BR>\n" );
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document.write( "We want to know when he'll be twice her age, so\r<BR>\n" );
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document.write( "(Dad's Age) = 2*(Katy's Age)\r<BR>\n" );
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document.write( "36+x = 2*(12+x)\r<BR>\n" );
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document.write( "Now solve for x\r<BR>\n" );
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document.write( "36+x = 2*(12+x)\r<BR>\n" );
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document.write( "36+x = 24 + 2x\r<BR>\n" );
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document.write( "36 = 24 + 2x-x\r<BR>\n" );
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document.write( "36-24 = 2x-x\r<BR>\n" );
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document.write( "12 = x\r<BR>\n" );
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document.write( "x = 12\r<BR>\n" );
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document.write( "In 12 years, Katy will be 12+12 = <font color=\"red\">24 years old</font> and her dad will be 36+12 = 48 years old (notice how he's twice as old, since 48 = 24*2) </SPAN>\n" );
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