Question

the width of a rectangle is 4 inches less than its lengths if the perimeter is 20 inches what is the length

Answer 1

• The length is 7 inches

Explanation:

Let the length be l.

Then the width is w = l - 4.

The perimeter formula for rectangle is:

• P = 2(l + w)

Substitute the values and solve for l:

• 20 = 2(l + l - 4)
• 10 = 2l - 4
• 2l = 14
• l = 7