Question 49336
<pre><tt>P=2(L+W)
L=2W+1
P=26

replace L in the first equation with its equivalent from the second, 2W+1.
P=2(2W+1+W)    DISTRIBUTE
P=4W+2+2W      -2 BOTH SIDES, SIMPLIFY
P-2=6W         Replace P with its equivalent from the third equation, 26
26-2=6W        SIMPLIFY
24=6W          DIVIDE BY 6
4=W            Width=4. </pre></tt>