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 the number?

Answer 1

Answer:

Step-by-step explanation:

let the no. which amina thought be X

((X-5/2) x 8)=3X

8X-20.0=3X

8X-3X=20

5X=20

X=20/5

X=4

Answer 2

Answer:

Number = 4

Step-by-step explanation:

Let the required number be x.

According to the question,

When the number is subtracted by 5/2, and the resulting number is multiplied by 8, then the result now obtained is 3 times the same number.

Equation :

$\sf \implies 8 \left(x-\frac{5}{2}\right) = 3x \\\\\implies \sf 8x - 20 = 3x \\\\\implies \sf 8x - 3x = 20 \\\\\implies \sf 5x = 20 \\\\\implies \sf x= \frac{20}{5} \\\\\implies \sf x = 4$

Hence, the required number is 4.