It is true for all permissible values of any variables in the equation. More simply put, it is always true.
Chat with our AI personalities
Identity equation
An equation that is always true is an identity.
Such an equation is called an IDENTITY.
A solution to an equation is a set of values for the variables in the equation which make it true.
16 = 16 is an identity, not an equation. An identity does not have solutions.