Question 880264
The formula for the surface area of an open topped rectangular box is:
 S = LW + 2LH + 2WH where S,H,W, and L represent surface area, height, width, and length, respectively.
 solve this formula for W.
;
LW + 2LH + 2WH = S
LW + 2WH = S - 2LH
factor out W
W(L + 2H) = S - 2LH
divide both sides by (L+2H)
W = {{{((s-2LH))/((L+2H))}}}