Question 915897
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Hi,
     *[illustration rectangle.png].
Lw = 112cm^2
L = (w+6)
........
(w+6)w = 112
w^2 + 6w -112 = 0  (Tossing out the negative solution for unit measure)
(w + 14)(w - 8) = 0
w = 8cm  and L = 14cm {{{8 + 6}}}
And..checking
{{{8cm*14cm = 112cm^2}}}