The perimeter of a rectangle is 68 ft. Find the dimensions of the rectangle if the ratio of the length to the width is 9 : 8. Which of the following would be the best equation to use to solve this problem?
A. 2x + 2x = 68
B. (9 + 8) = 68x
C. 9x + 8x = 68
D. 2(9x) + 2(8x) = 68
