Verified Answer :

AL2006


                           P = 2(L +W)

Divide each side of the equation by 2 :    P/2 = L + W

Subtract  W  from each side :                  P/2 - W  =  L


konrad509

\(P=2(l+W)\\ l+W=\dfrac{P}{2}\\ l=\dfrac{P}{2}-W\)

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