A tailor trims 7 feet from opposite edges of a square piece of cloth, and 5 feet from the other two edges. If 45 square feet of cloth remain, what was the length of a side of the original piece of cloth?	Choose one:
A) 13
B) 15
C) 17
D) 19
E) 21
Let the original side of the square be x.   (x-14)*(x-10) = 45 = 5*9   x = 19   The answer is 19.
<result>D</result>
A tailor trims 7 feet from opposite edges of a square piece of cloth, and 5 feet from the other two edges. If 45 square feet of cloth remain, what was the length of a side of the original piece of cloth?