Sabrina has a rug with a perimeter of 18 feet. She decides to place a border around the rug so that the new length of the rug is 8 feet and the width is 4 feet. The border is the same width all the way around. The equation which represents x, the width of the border is 2 (8-2x) + 2 (4-2x) = 18. What is the width of the border?
a. 3/4
b. 1 1/2
c. 1 ft
d. 3 ft
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