Math, asked by koranisansha621, 10 months ago

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

Answers

Answered by harikairuvuru
11

Answer:

The number she thinks is 4

Step-by-step explanation:

Let n be the number

Amina thinks of a number and subtract 5/2 from it  then result=n-(5/2)

she multiples the result by 8 so result=(n-(5/2))*8=(2n-5)*4=8n-20

The result is equal to 3 times the number

8n-20=3n

5n=20

n=4

So the number she thinks is 4

Answered by Anonymous
7

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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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