<PRE><B>Question 1059945</B>
ASSUMPTION:  The driveway is part of the square lot.  The house area and the driveway area compose the entire square lot.


Area of the lot, {{{100^2=10000}}} square feet.


Uniform width of driveway, w.


Area which just the house covers, {{{(100-w)(100-2w)}}}; a picture will help you to see this.


The only parts of this lot area are HOUSE and DRIVEWAY; and if house area and driveway areas are equal, then each of them is equal to  {{{10000/2=5000*squareFeet}}}.  Just the whole entire area cut in half.


{{{(100-w)(100-2w)=5000}}}
Simplify;
Solve for w.</PRE>