Question

A number added to its one fourth is equal to 15. Find the number.

Answer 1

Step-by-step explanation:

let the number = x

according to the question

x + x/4 =15

$\frac{4x + x}{4} = 15 \\ \frac{5x}{4} = 15 \\ 5x = 15 \times 4 \\ x = \frac{15 \times 4}{5} \\ x =3 \times 4 \\ x = 12$

Answer 2

SOLUTION

GIVEN

A number added to its one fourth is equal to 15

TO DETERMINE

The number

EVALUATION

Let the required number = 4x

Then one fourth of the number = x

So by the given condition

4x + x = 15

⇒ 5x = 15

⇒ x = 3

Hence the required number

= 4 × 3

= 12

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