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Anonymous
-24
Norris Bernhard ∙
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You should spot that both 12 and 36 divide by 12, so 12x - 36y = 12(x=3)
Wiki User
(12x - 6)(12x + 6)
Since 3x is a factor of 12x, it is automatically the GCF.
If you are looking for common factors of 12x and 9 it would be 3.
4x
6x