1. Rewrite this statement according to the rule: term with l leave in the right side and terms without l write in the left side.
P-2w=2l.
2. Change left and right sides:
2l=P-2w.
3. Divide the whole equation by 2:
[tex]l=\dfrac{P}{2}-\dfrac{2w}{2}=\dfrac{P}{2}-w.[/tex]
Answer: [tex]l=\dfrac{P}{2}-w.[/tex]