They are callled: Identical equations or Identities
See: http://www.tutorvista.com/search/value-algebraic-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.
A math sentence stating two quantities or expressions are equal is called an equation. Equations typically contain an equal sign (=) to show the relationship between the two sides of the equation. Solving an equation involves finding the value of the variable that makes the equation true.
An equation.
An equation.
An equation
That's an equation.