length of a dog run is 9 feet more than twice the width and the perimeter is 34 feet, what is the length and width

1) l=2w+9
2) 34=2(l+w) 


from 2)...
 17=l+w
17=(2w+9)+w
17-9=3w
w=8/3 

so 
l=
2*8/3+9=
16/3+27/3=
43/3