SOLUTION: If I am asked to solve for l, using the surface are of a prism (s=2lw+2lh+2wh) and I am not given any numbers, how do I solve for l?

Question 779490: If I am asked to solve for l, using the surface are of a prism (s=2lw+2lh+2wh) and I am not given any numbers, how do I solve for l?
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
If I am asked to solve for l, using the surface are of a prism (s=2lw+2lh+2wh) and I am not given any numbers, how do I solve for l?
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You isolate L on one side of the equal sign.
s=2lw+2lh+2wh
s/2 = LW + LH + WH
s/2 - WH = LW + LH
s/2 - WH = L*(W + H)
(s/2 - WH)/(W + H) = L

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