Given:
Consider the given equation is
[tex]P=2L+2W[/tex]
To find:
The solution of the equation for l.
Solution:
We have,
[tex]P=2L+2W[/tex]
Substract 2W from both sides.
[tex]P-2W=2L+2W-2W[/tex]
[tex]P-2W=2L[/tex]
Divide both sides by 2.
[tex]\dfrac{P-2W}{2}=\dfrac{2L}{2}[/tex]
[tex]\dfrac{P-2W}{2}=L[/tex]
[tex]L=\dfrac{P-2W}{2}[/tex]
Therefore, the correct option is 3.
