Question 53533
Perimeter = length + width [Use the formula for perimeter]
Perimeter =34
width = length-7
P=length + width
34=x+(x-7)  [Plug-in the values into the formula for perimeter]
34=2x-7 [Simplify]
34+7=2x-7+7 [Solve for x]
41=2x
41/2=2x/2
41/2=x
.
Check by plugging 41/2=x back into the original formula