Question 91974
Let w=width of the rectangle

Then length(l)=2w+2

Perimeter=2l+2w  so our equation to solve is:

34=2(2w+2)+2w  get rid of parens

34=4w+4+2w  subtract 4 from both sides

34-4=4w+4-4+2w  collect like terms

30=6w  divide both sides by 6

w=5in-------------------------------width of rectangle

2w+2=2*5+2=12in--------------------length of rectangle

CK

34=2*5+2*12
34=10+24
34=34
also 
12=2*5+2
12=12


Hope this helps---ptaylor