Question

A rectangle's perimeter and its area have the same numerical value. The length of the rectangle is 7 units. What is the width of the rectangle in units?.

Answer 1

w = 14/5 = 2
`(4)/(5)`

Explanation:

A = wl

P = 2w + 2l

l = 7

A = P

7w = 2(w) + 2(7)

5w = 14

w = 14/5 = 2
`(4)/(5)`

check the answer:

A = (14/5)(7) = 19.6

P = 2(14/5) + 14 = 19.6 answer is correct!