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25-04-2020
Mathematics

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Thirty-one is subtracted from a number which has been doubled. The result is the same as eleven subtract the original number.

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lottearentsen08 lottearentsen08

25-04-2020

Say that the original number is x. Since we know that the answer is the same, we can say 31-2x = 11-x

31-2x = 11-x
31-11=-x+2x
X = 20

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