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44 = 2(3x+1+5x-11)
44 = 2(8x-10)
44 = 16x-20
-16x = -64
x = 4
⇒ p = 3x+1
= 3.4 +1
= 13cm
⇒ l = 5x-11
= 5.4-11
= 9cm