<PRE><B>Question 793853</B>
P = Lw
length (L) = 3w - 4
width (w)
Perimeter = 56

2w + 2(3w -4) = 56
2w + 6w - 8 = 56
8w - 8 + 8 = 56 + 8
8w = 64
8w/8 = 64/8
w = 8
length = 3(8) - 4
       = 24 - 4
       = 20
check:
2(8) + 2(3(8) - 4) = 56
16 + 2(24 - 4) = 56
16 + 2(20) = 56
16 + 40 = 56
56 = 56
Area = Lw
     = 20 * 8
     = 160 in^2</PRE>