Question 153246
S = 2WL + 2LH + 2WH; (solve for L)
:
Subtract 2WH from both sides:
S - 2WH = 2WL + 2LH
:
Factor out L on the right:
S - 2WH = L(2W + 2H)
:
Divide both sides by (2W+2H)
L = {{{((S-2WH))/((2W+2H))}}}