If on adding 9 to twice of a whole number gives 31, then the whole number is

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Solution

The correct option is D
11

Let the whole number be x.

Twice of the whole number = 2x

9 added to twice of the whole number = 9 + 2x

From the given information, we have:

9 + 2x = 31

2x = 31 - 9

2x = 22

x = 11

Thus, the required whole number is 11.

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