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20 - 4x
4x - 20
4x(20)

 Mar 2, 2021
 #1
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if we have 20 less than 4 times a number, we would be subtracting 20 from the 4 times the number. therefore, the only one that represents 20 less than 4 times a number is $\boxed{4x-20}$

 Mar 2, 2021

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