Question 364740
l = w+5,
Perimeter is 2l+2w, and so 2l+2w = 9w.  By direct substitution,
2(w+5)+2w = 9w.
2w+10+2w = 9w,
4w+10 = 9w,
10 = 5w,
w = 2, the width, while the length is 7.