Question

I am a number tell my identity take me seven times over and add a 50 to reach a triple century you still need 40

Answer 1

Let the number be x.
According to the given condition,
7x+50+40=300
7x+90 = 300
7x = 300-90
7x = 210
x= 210/7
x = 30

Ans: The number is 30.

I hope this is the right answer.

Answer 2

let the number be x
7 times the number is 7x
then add fifty, you get,
7x+50
to reach 300 , you need 40 more.
7x+50+40=300
7x=210
x=30

hope it helps