7th Grade · Expressions & Equations
Two-Step Equation
7.EE.B.4a
Definition
An equation requiring two inverse operations to isolate the variable. Undo addition/subtraction first, then multiplication/division.
Examples
- 2x + 3 = 11 → subtract 3 → 2x = 8 → divide by 2 → x = 4.
- Whatever you do to one side, you must do to the other side.
Key rule
Undo addition/subtraction first, then multiplication/division.
Memory hook
Two steps, in the right order, to isolate x.