Question 36144
Step 1.
-First you must suppose that the width is "x". 
-The length of the rectangle is 2 inches less than 3 times the width.
So that would make the length (3x-2)

Step 2.
-To find the perimiter of a rectangle: 2W X 2L.

Step 3.
-Form the equation.

2(3x-2) + 2(x) = 68

6x-4 + 2x = 68

8x=64

x=8

The width is 8 inches.
The length is 22 inches.

Check.
2(8)+ 2(22) = 68 inches