Solution 23530: Examples and Differences Between Expressions, Equations and Inequalities.
How to tell the difference between an expression, equation, and inequality?
In mathematics, an expression is a general term for any well formed combination of mathematical symbols. It may consist of just one or more numbers, variables, operators, functions, and their arguments that evaluate to a single answer.
A + 2A
An equation is a mathematical statement, in symbols, that has two expressions that are exactly the same (or equivalent).
A + 2A = 3A
An inequality is a statement about the relative size or order of two expressions.
A < A + 1