Question

Can anyone help me pls

Answer 1

`perimeter = 2(l + b) \\ 16x - 20 = 2(2l)(square \: so \: l = b) \\ 16x - 20 = 4l \\ l =( 16x - 20 )/ 4 = 4x - 5 \\ thank \: you`

Answer 2

4x - 5 ft

Explanation:

Perimeter = 4 × side

16x - 20 = 4 × side

(16x - 20)/4 = side

4x - 5 = side