document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=655161>Question 655161</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Sahara is3 times as old as rob. Their ages together add up to 16. How old is sahara?  Show me how to write out the equation so i can get the answer.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #408969 by </B><A HREF=/tutors/aboutme.mpl?userid=nerdybill><B>nerdybill(7384)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nerdybill><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=nerdybill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=408969\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Sahara is3 times as old as rob. Their ages together add up to 16. How old is sahara?  Show me how to write out the equation so i can get the answer. <BR>\n" );
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document.write( "Let s = Sahara's age<BR>\n" );
document.write( "and r = Rob's age<BR>\n" );
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document.write( "From:\"Sahara is3 times as old as rob.\" we get equation 1:<BR>\n" );
document.write( "s = 3r<BR>\n" );
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document.write( "From:\"Their ages together add up to 16\" we get equation 2:<BR>\n" );
document.write( "s+r = 16<BR>\n" );
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document.write( "Substitute 's' as defined in equation 1 into equation 2 and solve for r:<BR>\n" );
document.write( "s+r = 16<BR>\n" );
document.write( "3r+r = 16<BR>\n" );
document.write( "4r = 16<BR>\n" );
document.write( "r = 4 years old (Rob's age)<BR>\n" );
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document.write( "Sahara's age:<BR>\n" );
document.write( "s = 3r = 3(4) = 12 years old<BR>\n" );
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