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?

Solution:

Let the number be x.

According to the given question,

8 (x - 5/2) = 3x

8x - 20 = 3x

Transposing 3x to LHS and -20 to RHS, we obtain

8x - 3x = 20

5x = 20

Dividing both sides by 5, we obtain

x = 4

Hence, the number is 4.

☛ Check: NCERT Solutions for Class 8 Maths Chapter 2

Video Solution:

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?

NCERT Solutions Class 8 Maths Chapter 2 Exercise 2.4 Question 1

Summary:

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. The number is 4.

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