Question

When a number is added to its 2/5 , the result is 21 , find the number​

Answer 1

Answer

Acc to question,

Let, Number be x

Then,

➡ 2/5 + x = 21

➡ x = 21 - 2/5

➡x = (105 - 2)/5

➡x = 103/5

Answer 2

Answer:

let the number be x

according to question

$x \: + \frac{2}{5} x \: = 21 \\ \frac{5x + 2x}{2} = 21 \\ 7x = 42 \\ x = 6$