Question

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 number?

Answer 1

let the number be x

she subtracts 5/2 from x

thus

x-5/2

she multiplies result with 8

( x- 5/2) ×8

the result is 3 times the original number x

3x

thus

(x- 5/2) × 8= 3x

8x- 20= 3x

8x -3x= 20

5x= 20

x=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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