Here we have a balance with 3 kg on the left and an unknown mass x on the right.[br][br]Suppose we want to make the balance tilt to the right. We have to make the right side heavier than the left ![br][br]What are the possible values of x so that the right side of the balance is heavier ?

If you say x has to be more than 3, you got it right![br][br]x could be any value, for example  3.01, 3.1 or 3.2 or 4 and so on.[br][br]How do we write "x is more than 3" ?   it's  x > 3                    [br][br]We were looking for values of x which will make the balance tilt down on the right.[br][br]We say that the solution for x is    x > 3