Answer :
To find the equation for width in terms of length and perimeter, we need to solve for w in the equation for perimeter:
[tex]p=2l+2w[/tex]
[tex]p-2l=2w[/tex]
[tex]\frac{1}{2}p-l=w[/tex]
[tex]p=2l+2w[/tex]
[tex]p-2l=2w[/tex]
[tex]\frac{1}{2}p-l=w[/tex]