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08-09-2019
Mathematics

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Twice the difference of a number and 9 is 5

Use the variable c for the unknown number.

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08-09-2019

Answer:

C = 11.5

Step-by-step explanation:

1. (c - 9) 2 = 5

2. 2c - 18 = 5

3. 2c = 23

4. c = 11.5

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