The perimeter of a rectangle is 40 inches. If the length of the rectangle is 12 inches, which equation could be used to find the width, x?

A. x+2 (12) = 40

B. 12 (x+2) = 40

C. x+12 = 40

D. 2 (x+12) = 40

Answer: D. 2 (x+12) = 40

Step-by-step explanation:

The Perimeter of a rectangle is calculated by the formula:

P = 2 (length + width)

Let the width of the rectangle be x, then the perimeter becomes

40 = 2 (12 + x)

C. x + 12 = 40