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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?

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?

Grade:8

1 Answers

Vedant Borkar
28 Points
one year ago
Let us take the number as thought by Amina to be 'x'.
 
First she subtracts 5/2 from it :
     x-(5/2)
Then she multiplies it by 8:
    8.{x-(5/2)}
Finally the result is three times the original number:
    8.{x-(5/2)}=3x
    8x - 20=3x
    5x=20
   -------> X=4.   

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