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The greatest common factor is the biggest number that multiplies into making 15w and 21.

  • 15w = 3 • 5 • w
  • 21 = 3 • 7

So the GCF is 3. We simply pull it out from the problem.

  • 3(5w+7)
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13y ago

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More answers

The GCF is 3.

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9y ago
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Q: What is the greatest common factor in 15w plus 21?
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