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Answer :

Answer:

12 x X x 1/2 = 54

12x x 1/2 = 54

x2              x2

12x = 108

divide by 12 on both sides:

X = 9

Let's double check!

9 x 12 = 108

108 divided by 2 = 54

IT WORKS!

Therefor your answer will be,

9!