The formula for the perimeter of a rectangle is given by
[tex]P=2l+2w[/tex]The student was asked to solve for length (l) and he came up with the following answer
[tex]P-2w=2l[/tex]Notice that he did not fully solved the equation for length (l)
He needs to separate the length (l) by dividing both sides by 2
[tex]\begin{gathered} \frac{P-2w}{2}=\frac{2l}{2} \\ \frac{P-2w}{2}=l \\ l=\frac{P-2w}{2} \end{gathered}[/tex]Now, the equation is solved for length (l)
