Question 1046119

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Hi,
     *[illustration rectangle.png].
Let x represent width, length (2x-5)
P = 2L + 2w
68 = 2(2x-5) + 2x  |In cm
68= 6x-10
78 = 6x
13cm = x, width.  Length is 21 {{{2*13-5}}}

AND
42 + 26 = 68  CHECKS!