document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1121307>Question 1121307</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I was asked to solve this linear equation.<BR>\n" );
document.write( " A man is four times as old as his son. In four years  time he will be three times older in age, what are their ages now </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #737136 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=737136\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let x equal the son's age now.\r<BR>\n" );
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document.write( "the father's age now is therefore equal to 4x.\r<BR>\n" );
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document.write( "i think you mean that, in 4 years time, he will be 3 times as old as his son.\r<BR>\n" );
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document.write( "in 4 years, the father will be 4x + 4 years old.\r<BR>\n" );
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document.write( "in 4 years, the son will be x + 4 years old.\r<BR>\n" );
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document.write( "in 4 years the father will be 3 times as old as the son leads to the equation:\r<BR>\n" );
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document.write( "4x + 4 = 3 * (x + 4)\r<BR>\n" );
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document.write( "simplify this to get 4x + 4 = 3x + 12\r<BR>\n" );
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document.write( "subtract 3x from both sides of this equation and subtract 4 from both sides of this equation to get:\r<BR>\n" );
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document.write( "x = 8\r<BR>\n" );
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document.write( "that's his son's age today.\r<BR>\n" );
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document.write( "he is 4 * 8 = 32 years old today.\r<BR>\n" );
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document.write( "in 4 years, he will be 36 years old and his son will be 12 years old.\r<BR>\n" );
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document.write( "36 = 3 * 12 means that he will be 3 times as old as his son in 4 years.\r<BR>\n" );
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document.write( "today he's 32 and his son is 8.\r<BR>\n" );
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document.write( "32 = 4 * 8\r<BR>\n" );
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document.write( "4 years from now, he will be 36 and his son will be 12.\r<BR>\n" );
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document.write( "36 = 3 * 12.\r<BR>\n" );
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document.write( "your solution is that their he is now 32 and his son is now 8.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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