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Amina thinks of a number and subtracts 5/2 from it. She multiplies the result by 8. the final result is 3 times her original number. Find the number.

Amina thinks of a number and subtracts 5/2 from it. She multiplies the result by 8. the final result is 3 times her original number. Find the number.

Grade:12

1 Answers

Anand Kumar Pandey
askIITians Faculty 5733 Points
5 months ago
Dear Student

Let the number thought by Amina be x

She subtracts 5/2 from the number.

x – 5/2

Now, she multiplies the result by 8

8(x – 5/2)

The result obtained is three times her original number;

8(x – 5/2) = 3x

8(x – 5/2) = 3x

8x – 20 = 3x

5x = 20

x = 4

Hence, the number is 4.

Thanks

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