the width of a rectangle is 2 less than its length. if the perimeter of the rectangle is no more than 30 centimeters , find the range of the possible lengths and widths using the formula P=2L+2W

Solution:

W:x

L:x+2

2(x+x+2)<=30

x<=6.5

So width should be no more than 6.5cm, length no more than 8.5cm