We define the desired unsettled perimeter of the walls of the room using the conditional variable “Y”.
At the second step, taking into account the conditions of this problem and applying the perimeter formula, we obtain the following equation: Y = 2 x (3 + 3 + 3 + 3) + 2 x (4 + 4 + 3 + 3).
When we solve this equation, we will have the following Y = 12 x 2 + 14 x 2 = 24 + 28 = 52 meters.
Answer: the desired perimeter of the room walls is 52 meters.
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