They are callled: Identical equations or Identities
See: http://www.tutorvista.com/search/value-algebraic-expressions
Two expressions that are equal are called "equivalent expressions." These expressions yield the same value for all values of their variables. In mathematics, this concept is essential for solving equations and simplifying expressions.
It is an equation
When two expressions are equal to each other they form an equation.
When two expressions are equal they can form an equation.
If two mathematical expressions are equal then they form an equation.
The answer follows.
An equal sign (=) with a slash through (/) represents that two expressions are disproportional.
two expressions that have the same value for all allowable replacements are called equivalent.
Two expressions set equal to each other are called an equation. An equation represents a mathematical statement asserting that the values of the two expressions are the same. Solving an equation involves finding the value(s) of the variable(s) that make the equation true.
An equation.
That's an equation.
An equation.