Question

Hamid thinks of a number and then he doubles it. He adds 5 to it. He gets an answer equal to 3 times the number. What is the number?

Answer 1

take the no as x and then form equations as per the given conditions....
hope the solution in the Attatchment helps u

Answer 2

Let, the number be 'X'

∴Double of X=X×2=2 X

∴The new number= 2 X+5

By condition,

2 X +5= 3× X

⇒5=3 X - 2 X

⇒5= X

⇒ X = 5

∴ The number is 5