If we have two sides equal each other, then we called the statement "equation"
Example:
2x + 3 = 5x - 2 is called an equation
2x + 3 is an algebraic expression
5x - 2 is an algebraic expression
When we put = sign between them, they called an equation
Then when two equal signs are placed between two algebraic expressions, they formed an equation
The answer is an equation