Problem
Paolo wrote the following equation for the perimeter of a rectangle. \[ P=2(i+w) \] Which equation is equivalent to the equation Paolo wrote? $w=P-2 i$ $w=P-i$ $w=\frac{P-2 l}{2}$ $w=\frac{P+2 l}{2}$
Solution
Step 1 ：Given the equation for the perimeter of a rectangle: \(P = 2(i + w)\)
Step 2 ：Isolate w: \(w = \frac{P - 2i}{2}\)
