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10-08-2021
Mathematics

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Twice a certain number is subtracted from 9 times the number. The result is 21. Find the number.

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rococo908 rococo908

10-08-2021

Answer:

3

Step-by-step explanation:

Let x represent the number.

Create an equation to represent the situation, and solve for x:

9x - 2x = 21

7x = 21

x = 3

So, the number is 3.

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