Always, sometimes or never?
This task requires you to know if equations are always true, only true for some values of x, or never true.
Some equations are always true.
e.g., 2x = x + x is true for all values of x (3, 5.5 etc)
Some equations are only true for some value of x.
e.g., x + 1 = 2 is only true for one value of x (i.e., x = 1)
Some equations are never true.
e.g., x = x + 1 is never true whatever value x takes.