Question

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 1

C. x + 12 = 40

Answer 2

Answer: D. 2(x+12) =40​

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 )