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Amina thinks a number and subtracts from it. She multiplies the result with 8. The result now obtained is 3 times the same number she thought of as the number.

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answer is D.

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Detailed Solution

Concept: Assume the number to be any variable as you continue with the solution, then follow the instructions to get the solution.
Let x be the number,
As the given details the equation becomes,
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Hence, the correct option is 4.

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