# Equation vs. Expression

Students often confuse the concept of an “equation” with the concept of an “expression”. An expression is a collection of variables and constants, such as 2x+1. An equation is one expression set equal to another expression.

Students often confuse the concept of an “equation” with the concept of an “expression”. An expression is a collection of variables and constants, such as 2x+1. An equation is one expression set equal to another expression.