Question 753920
<pre>
Sorry, what you have is NOT correct. You tried to use the 
perimeter of a rectangle formula P = 2L + 2W.  But that 
particular perimeter formula is only good when there are 
FOUR sides of fencing, not when there are only THREE sides 
of fencing, as this problem states: 

      ___HOUSE, NO FENCE__
        |              | 
       W|              |W 
        |______________|
             2W-3

So you must use this 
formula instead:

LEFT SIDE + FRONT SIDE + RIGHT SIDE = TOTAL LENGTH OF FENCE
    &#8595;           &#8595;            &#8595;               &#8595;
    W     +   2W-3     +     W      =       33 

Answer:  W = 9 feet,  Length = 2W+3 = 2(9)+3 = 18+3 = 21 feet        

Edwin</pre>