The formula for finding the perimeter of a rectangle is
[tex]P=2(\text{l+w})[/tex]Here l is the length and w is the w.
In this case it is given,
[tex]\begin{gathered} P=62 \\ w=l-5 \end{gathered}[/tex]So, the equation becomes,
[tex]62=2(l+l-5)[/tex]The variables are l and w.