Answer:
recatnge have 4 sides= 144/4 = 36
12 x 3 = 36
Explanation:
12x³
The area (A) of a rectangle is calculated as
A = length × width
Here width = 12x and A = 144 , thus
length × 12x = 144 ( divide both sides by 12x )
length = = × = 12x³
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