Question 1035658
Area A = LW = 105
We also have L = 2W + 1.
Now substitute and get
(2W+1)W = 105
2W^2 + W - 105 = 0
Now factor and solve
(2W + 15)(W - 7) = 0
so that 
W = 7 feet and
L = 2W + 1 = 15 feet