document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1061388>Question 1061388</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Laura is four years less than twice her son's age. The sum of their ages is 119. How old is Laura? How old is her son?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #676167 by </B><A HREF=/tutors/aboutme.mpl?userid=HelpfulBro><B>HelpfulBro(2)</B></A><img src=\"/images/stars/iconNewId_16x16.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=HelpfulBro><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=676167\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> We give representations:\r<BR>\n" );
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document.write( "let l be the age of Laura<BR>\n" );
document.write( "let s be the age of Laura's son\r<BR>\n" );
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document.write( "According to the problem, Laura is four years less than twice her son's age\r<BR>\n" );
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document.write( "we write that as l = 2*s - 4 (we let this be equation 1)\r<BR>\n" );
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document.write( "It also says there that The sum of their ages is 119:\r<BR>\n" );
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document.write( "l + s = 119 (we let this be equation 2)\r<BR>\n" );
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document.write( "What we do now is to use equation one in equation two (substitution) \r<BR>\n" );
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document.write( "l + s = 119 <BR>\n" );
document.write( "(2*s - 4) + s= 119<BR>\n" );
document.write( "3*s = 119 + 4<BR>\n" );
document.write( "3*s = 123<BR>\n" );
document.write( "s = 41\r<BR>\n" );
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document.write( "So, the son's age is 41. Now we solve for Laura's age using equation 1\r<BR>\n" );
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document.write( "l = 2*s - 4<BR>\n" );
document.write( "l = 2*41 - 4<BR>\n" );
document.write( "l = 82 - 4<BR>\n" );
document.write( "l = 78\r<BR>\n" );
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document.write( "Laura's age is 78.\r<BR>\n" );
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document.write( "To check if we got it right,\r<BR>\n" );
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document.write( "l+s = 119\r<BR>\n" );
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document.write( "41 + 78 = 119\r<BR>\n" );
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document.write( "119 = 119 \r<BR>\n" );
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document.write( " </SPAN>\n" );
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