Question

One fourth of a number exceeds one seventh of the number by 3.find the number

Answer 1

X/4-x/7=3
X/28=1
X=28
The number is 28

Answer 2

Let the number be x
Given:
                1/4 of x = (1/7 of x) + 3
                x/4 = x/7 + 3
                x/4 - x/7 = 3
                7x/28 - 4x/28 = 3
                3x/28 = 3
                x = 3 * 28/3
                x = 28
∴ The required number is 28.

Hope my answer helps you..