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shamuisforrealz
The prime factorization of 18 is 2 x 3 x 3 = 18. The prime factorization of 27 is 3 x 3 x 3 = 27. The occurrences of common prime factors of 18 and 27 are 3 and 3. So the greatest common factor of 18 and 27 is 3 x 3 = 9. Hope this helped
taterjaxx
Hi. The common factors of 18xy and 32xyz is 2xy

To check the answer:  2xy(9+16x) = 18xy and 32xyz

Hope this helps.
Take care,
Diana