<PRE><B>Question 278734</B>
L = W + 4


(L + 6)(W + 6) - LW = 300


6L + 6W + 36 = 300


L + W = 44


substituting ___ (W + 4) + W = 44 ___ 2W = 40 ___ W = 20


substituting ___ L = (20) + 4 = 24</PRE>