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88 = 2 (6x-4+4x-2)
88:2 = 10x-6
44 = 10x-6
44+6 = 10x
50 = 10x
50:10 = x
5 cm = x
p = 6x-4
= 6.5-4
= 26 cm
l = 4x-2
= 4.5-2
= 18 cm
L = pxl
= 26x18
=408 cm2