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Since the only variable, "x", is not a common factor, you just need to calculate the common factor of the numbers.In this case, you might start with the smallest number, check whether it's a factor of the others. If it is, that's the answer; if it isn't, the greatest common factor will be one of the factors of this smallest number.

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9y ago

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You can take a 4 out of all three of those.

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8y ago
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24x2

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12y ago
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Q: What is the greatest common factor for 72x -80x 4?
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