Question

I am a number,tell my identity, take me seven times over and add a fifty, to reach a triple century you still need forty

Answer 1

let the number be x.

Then,

ATQ

7x+50=300-40

solving for x, we get x=30

hope it helps

bebrainly

Answer 2

Let the number be n.

According to the question,  

7n + 50 + 40 = 300

⇒7n + 90 = 300

⇒7n = 300 − 90

⇒7n = 210

⇒ n = 7/210

⇒ n = 30

Thus, the required number is 30.