Answer:
The width is 13
Explanation:
From the question
P=2L+2W
where
L is the length
W is the width
To make W the subject move 2L to the left side of the equation
That's
2W = P - 2L
Divide both sides of 2 to make W stand alone
We have

when
P = 70
L = 22
W is

We have the final answer as
W = 13
Hope this helps you