<PRE><B>Question 1170658</B>
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At tye present, Robert is three times as old as his son. 
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?


What was that?  Is supposed to be this instead?
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At present, Robert is three times as old as his son. 
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Ages 3x and x at present time.

{{{(3x-4)=4(x-4)}}}
-
{{{3x-4=4x-16}}}
{{{-4+16=x}}}
{{{highlight(x=12)}}}--------------his son now</PRE>