Question 964862
Let the width be x.
Then the length is 2x-4.
Area=Length*width
70=x(2x-4)
x(x-2)=35
x^2-2x-35=0
x^2-7x+5x-35=0
x(x-7)+5(x-7)=0
(x+5)(x-7)=0
x=7 or x=-5
Since the width is positive x=-5 is not possible.
x=7 is the solution.
The width is 7 feet.