Question

Amina think of a number and subtracts 5/2 from it. She multiplies the result by 8. The result now obtained is 3 times the number she thought of. What is the number?

Answer 1

Let the number be x
(x-5/2) × 8=3x
2x-5/2×8=3x
4(2x-5)= 3x
8x-20=3x
8x-3x=20
5x=20
x=20/5=4
Number = 4

Answer 2

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Amina thinks of a number and subtracts 5/2 from it. She multiplies the result by 8. The result now obtained is 3 times the same number she thought of. What is the number?

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Let the number she thought be x

ATQ ,she subtract the 5/2 from the no.= x-5/2

She multiply the result by 8 =8(x-5/2)

Solution:-

3x = 8(x-5/2)

3x=8x -20

20=5x

x=4

So, the number she thought is 4.

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