Answer:
[tex]\frac{A-2wh}{2(w+h)}=l[/tex]
Step-by-step explanation:
We have to find the formula for the value of 'l'.
So, we will isolate 'l' on one side of the formula.
A = 2lw + 2lh + 2wh
A = 2l(w + h) + 2wh
A - 2wh = 2l(w + h) + 2wh - 2wh
A - 2wh = 2l(w + h)
[tex]\frac{A-2wh}{2(w+h)}=\frac{2l(w+h)}{2(w+h)}[/tex]
[tex]\frac{A-2wh}{2(w+h)}=l[/tex]
Therefore, formula for 'l' will be,
[tex]\frac{A-2wh}{2(w+h)}=l[/tex]
