8th Grade · Expressions & Equations
Equation
8.EE.C.7b
Definition
A mathematical statement that two expressions are equal, shown with an equals sign. The goal is usually to find the value of the variable that makes it true.
Examples
- 2x + 3 = 11 is an equation.
- 2x + 3 (no equals sign) is only an expression, not an equation.
Key rule
Whatever you do to one side, you must do to the other to keep it balanced.
Memory hook
Two expressions, balanced by an equals sign.