What is a math sentence called that shows two expressions are equal, such as 3 + 4 = 7?

1. The statement 3 + 4 = 7 uses an equal sign to connect two things. 2. It states that the expression 3 + 4 has the same value as 7. 3. A math sentence that shows two expressions are equal is called an equation. 4. An expression is just the combination of numbers and operations without the equal sign, so 3 + 4 alone is an expression while 3 + 4 = 7 is an equation. _Source: OpenStax Prealgebra (CC BY 4.0), Ch 1 "Whole Numbers", section 1.2 Add Whole Numbers_