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9 by 5- 3 by 3 by 5

9 by 7 - 3 by 3 by 7

7 by 7.

you need to go to The Tutoring Center, I used to work there, Lowest Common Denominators are in the first few pages of their workbooks. The LCD for those three numbers is one. They don't share any other factors

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15y ago

What else can I help you with?