Question 290070
If the perimeter of a rectangle is 40 centimeters and the legnth is 8 centimeters, determine the width of the rectangle. 

Let W be the width of the rectangle. Then the perimeter is:

2*width + 2*length = 40

2*W + 2*8 = 40
2*W + 16 = 40
2*W = 40-16
2*W = 24
W = 12