Solve the literal equation P=2l+2wP = 2l + 2wP=2l+2w for www.
w=fracP−2l2w = \\frac{P - 2l}{2}w=fracP−2l2
w=P−2lw = P - 2lw=P−2l
w=fracP2−lw = \\frac{P}{2} - lw=fracP2−l
w=2P−2lw = 2P - 2lw=2P−2l