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To find the greatest common factor (GCF) of 18j + 27, we need to determine the highest factor that can divide both terms evenly.
First, we can factor out 18 from both terms:
18j + 27 = 9(2j + 3)
Now, we notice that both terms have a common factor of 9. Therefore, the GCF of 18j + 27 is 9.