Example (More than)

Here we have a balance with 3 kg on the left and an unknown mass x on the right. Suppose we want to make the balance tilt to the right. We have to make the right side heavier than the left ! What are the possible values of x so that the right side of the balance is heavier ?
Image
If you say x has to be more than 3, you got it right! x could be any value, for example  3.01, 3.1 or 3.2 or 4 and so on. How do we write "x is more than 3" ?   it's  x > 3                     We were looking for values of x which will make the balance tilt down on the right. We say that the solution for x is    x > 3